I bought Wet & Forget because it promised to handle the ugly green and black stains on my roof and siding without me climbing ladders every weekend or hiring expensive crews.
After years of watching mold creep back no matter what I tried, this product finally let me spray once and watch nature finish the job. If your home battles the same outdoor grime, you owe it to yourself to grab a bottle and reclaim your weekends.
My Experience With Wet & Forget

I still smile when I look at my roof now.
Last spring my shingles looked like a science experiment gone wrong after a particularly wet winter.
Black streaks ran down the sides, green patches covered the north-facing slope, and the deck boards had that slippery film that made me nervous every time the kids ran outside.
I had tried pressure washing before, but it left me exhausted and worried about damaging the shingles.
Bleach mixes always killed nearby plants and faded the wood stain too fast.
So when a neighbor mentioned Wet & Forget, I decided to give it a real shot.
I ordered the concentrate version to avoid any applicator headaches and mixed one part cleaner with five parts water in my pump sprayer. On a dry Saturday morning with no rain forecast for the next day, I suited up with gloves and goggles, then started on the roof from the ground using the extension wand.
The spray went on clear and had almost no smell, which surprised me compared to the chemical cleaners I used before. I made sure to soak every stained area until it dripped, then moved to the siding, the fence, and finally the concrete patio. The whole job took me less than an hour, and I never had to scrub a single spot.
The waiting began. For the first week nothing much changed except a faint orange tint on the green moss where it started dying. Then the rains came, and that is when the magic happened. Each shower seemed to wash away a little more of the dead growth.
By week three the black streaks on the white siding had faded to light gray. Month two brought the real transformation. My roof looked almost brand new from the street, and friends started asking what professional service I hired.
The deck stopped feeling slimy, and the patio pavers went from dingy to bright again. I did not rinse anything off, just let the weather do its work. Eight months later the surfaces still look clean, and I have not seen new growth even after heavy summer storms.
That experience sold me completely on how this product fits real life instead of promising overnight miracles that never deliver.
Also Read: Comparison of Simpson And DeWalt Pressure Washers.
Pros of Wet & Forget

- It saves you hours of back-breaking labor because you simply spray and walk away. I used to spend entire Saturdays with a pressure washer, dodging spray and worrying about slips on the ladder. With this cleaner I finished the entire exterior in under an hour and still had time to grill burgers that same afternoon. You get to skip the physical toll while still achieving results that last through seasons of rain and wind. The convenience alone makes every penny worth it when you compare it to hiring pros who charge hundreds for the same coverage.
- The formula stays gentle on your surfaces so you protect your investment instead of risking damage. My asphalt shingles stayed intact with no granule loss, unlike the times I tried stronger chemicals that stripped the protective layer. Wood decks keep their color longer because there is no harsh bleaching action eating away at the fibers. Even my vinyl siding looks fresh without the clouding you sometimes see from acidic cleaners. You can trust it on roofs, fences, patios, and brick without second-guessing whether you are shortening the life of your home.
- Results keep working long after application thanks to the way rain reactivates the cleaner. I noticed that light showers months later still lifted away tiny bits of residue, keeping things fresh without me lifting a finger. That built-in maintenance means one treatment often carries me through an entire year or more in my humid climate. You end up spending less money over time because you do not need constant touch-ups like with many other options that fade quickly.
- It stays safe around plants and pets when you follow basic precautions during application. I wet down my flower beds first and covered a few shrubs, and nothing showed any stress afterward. The bleach-free mix does not leave toxic runoff that kills grass or poisons soil. You get peace of mind knowing your family and yard stay protected while the stains disappear.
- The cost per use comes out surprisingly affordable once you see how far one bottle stretches. I covered my two-story home and large deck with less than half a gallon of concentrate mixed properly. Compared to professional cleanings that run three or four hundred dollars each time, this pays for itself after the first or second application. You save money and still get professional-looking results right from your own driveway.
- The lack of strong odor makes the whole process pleasant instead of a chore you dread. No burning eyes or lingering chemical smell in the yard for days afterward. You can apply it in the morning and enjoy your backyard by afternoon without holding your breath. That small detail adds up when you actually look forward to the yearly maintenance instead of putting it off.
Cons of Wet & Forget

- Results take time to show fully, so you need patience if you want instant gratification. I watched the first changes around two weeks in, but the heavy black mold on my north side needed nearly three months of rain cycles before it completely lifted. If you have guests coming next week and need picture-perfect surfaces right now, this might not fit your timeline. You learn to plan ahead and accept that slow and steady wins here.
- Heavy infestations sometimes need a second light application after six months, especially in very shady or constantly damp spots. My fence on the wooded side showed some regrowth by late fall, so I hit it again lightly and solved it. It is not a one-and-done forever solution in every climate, but the touch-up takes only minutes compared to starting over with other methods.
- You must avoid spraying on a day when heavy rain might hit within a few hours, or the product can wash off before it fully bonds. I learned that lesson the hard way on my first try when an unexpected storm diluted part of the roof treatment and left uneven fading. Planning around the weather forecast becomes part of the routine, though it gets easier once you know your local patterns.
- The initial investment feels higher than a simple bleach bottle from the store, even though the long-term savings are clear. If you only have a small patio to treat, you might wonder if the bigger jug is overkill. Once you factor in the coverage and durability, the value becomes obvious, but sticker shock can hit at first glance.
Also Read: Is EZ Jet Hydrowasher Worth It?
Tips For Wet & Forget
- Apply during a stretch of dry weather so the solution has time to set before the next rain. I aim for at least four to six hours of no precipitation after spraying, which gives it the best chance to penetrate the growth. Morning applications work great because the sun helps it dry without immediate wash-off.
- Mix the concentrate exactly one part cleaner to five parts water for standard strength, and use a good pump sprayer with a fan tip for even coverage. I measure with a dedicated container to keep ratios consistent every time. Shaking the mixture before each tank fill prevents separation and ensures every pass works at full power.
- Protect surrounding plants by thoroughly wetting them down before and after you spray the surfaces. I use a garden hose on mist setting to create a barrier, and I have never lost a single bush or flower. This simple step keeps your landscaping happy while the cleaner does its job on the hard surfaces.
- Store any leftover mixed solution in a clearly labeled sprayer out of direct sun, and it stays effective for several weeks. I keep mine in the garage and give it a quick shake before next use. The concentrate bottle itself lasts years in a cool spot, so you do not waste money on expired product.
- Reapply once a year in early spring or after particularly wet seasons to stay ahead of new growth. I mark my calendar for March because that timing catches the problem before summer humidity kicks in. A light annual treatment keeps everything looking fresh with minimal effort on my part.
- Check treated areas after big storms to see if any stubborn spots need a spot treatment. I walk around the house following heavy rain and note any areas that still look dull, then hit them with a quick spray the next dry day. This proactive habit prevents small issues from turning into big eyesores later.
- Avoid walking on wet treated surfaces until they dry completely to prevent tracking the solution indoors or onto plants. I keep the kids and dog off the deck for a few hours after application, and that simple rule avoids any accidental messes. The wait feels short when you know the payoff lasts so long.
- Combine yearly treatments with basic debris removal like clearing gutters and trimming overhanging branches to extend the clean look even further. I sweep pine needles off my roof twice a year and notice the surfaces stay brighter longer when I pair that with the spray. Small habits multiply the results without adding much work.
Comparison of Wet & Forget With Other Brands
- Wet & Forget Versus 30 Seconds Outdoor Cleaner
I tried 30 Seconds on my patio one year before switching to Wet & Forget, and the difference in approach stood out immediately. The 30 Seconds formula works faster on light stains and gave me visible results within days, but it required more careful rinsing to avoid residue buildup on the concrete.
Wet & Forget needed no rinsing at all and continued working through multiple rain events, keeping the patio cleaner longer into the season. While 30 Seconds felt stronger on fresh mildew, it also demanded more physical effort to apply evenly across large areas because of its ready-to-use thickness.
I found Wet & Forget easier on my arms during the spray session and gentler on the surrounding grass that borders my patio. For anyone who hates follow-up steps, the set-it-and-forget-it nature of Wet & Forget wins every time in my book.
- Wet & Forget Compared To Traditional Bleach Solutions
Bleach mixed with water gave me quick whitening on the siding the first time I used it, but within two months the black streaks returned worse than before, and my plants showed burn marks where overspray landed.
Switching to Wet & Forget eliminated that cycle because the gentler formula does not strip protective layers or create the rebound growth I saw with bleach. I no longer worry about fumes burning my lungs or the runoff harming my lawn.
Bleach demands constant reapplication every few months to maintain appearance, while one Wet & Forget treatment stretches through an entire year. The safety profile alone makes me glad I left bleach behind for good on outdoor surfaces.
- Wet & Forget Stacks Up Against Pressure Washing
Pressure washing delivered that satisfying immediate clean look, but I always ended up with damaged shingles and high water bills after tackling the roof. The force stripped away protective granules and left rough patches that actually collected more dirt faster.
Wet & Forget achieves similar brightness without any of that mechanical stress, and I never have to drag heavy equipment around the yard. The time savings feel huge when I compare one relaxed hour of spraying versus a full day of setup, washing, and cleanup with the pressure washer.
My surfaces last longer now because I stopped blasting them every season.
- Wet & Forget Versus Other Passive Cleaners Like Spray & Forget
Spray & Forget markets itself as a similar no-scrub option, and I tested it side by side on my fence sections last year. Both products rely on rain to finish the job, but Wet & Forget seemed to handle the deeper black mold better and left less visible residue after the first few rains.
The coverage per ounce felt more generous with Wet & Forget, so my bottle lasted through more square footage.
While Spray & Forget worked fine on lighter green algae, I noticed faster regrowth in shaded areas compared to the longer protection I get from Wet & Forget. For consistent year-round results across mixed surfaces, I reach for Wet & Forget every time now.
Also Read: Comparison of Dawn Powerwash And Regular Dawn.
Frequently Asked Questions (FAQ)
Yes, it kills growth on contact and rain removes the dead material over time.
The Xtreme Reach hose-end nozzle version had a clip issue that could spray solution on skin or eyes; free replacement nozzles fix it.
Light green stains fade in a few weeks, heavier black mold may take two to three months.
No, you let rain naturally wash away the dead growth.
Final Thoughts
I have come full circle with this product and cannot recommend it enough for anyone tired of endless outdoor cleaning battles. You spray it once, let the weather work its magic, and suddenly your home looks maintained without the constant effort.
Grab a bottle, follow the simple steps, and enjoy the freedom it gives you.
