Wet & ForgetOutdoor Moss, Mold, Mildew, & Algae Stain Remover Multi-Surface Cleaner, Xtreme Reach Hose End with New & Improved Nozzle, 48 Fluid Ounces

This stuff is great. I have been using it for years. We have vinyl siding and this is gentler than a power washer or harsh chemicals. Just spray it on. The mold and mildew stains will disappear slow but wont come back for a year or two. Heavy staining may take two applications.

This is easy to use and really works. I tried the attachable spray head but it wouldn't stay in place, but using no head it sprayed and covered well. It quickly killed the algae. Just waiting for rain to wash it off. Perfectly named, wet and forget.

Took a while after application, but my roof and deck have cleared off the algae.Not dirt, but I didn't expect it to.You can get it at Costco for $22 as of 2025, so not a good deal online.

Wow! Sprayed on a Sunday, the next day the top of the deck was clean. Giving it time to do its work under the deck. So far, very pleased with the results.

I just applied this product to my patio pavers so I won't know if it works for a while. This review is all about the delivery system (the part that the garden hose attaches to). It doesn't work well because: 1. You attach the hose with the water off. When you turn it on the product sprays out in a huge arc, spraying the yard. 2. The nozzle has 3 settings, Off, On, and Water. You rotate it to set it- and that's a huge problem because it continues to spray as you're trying to get it under control. This means you're twisting the nozzle connection AND the hose at the same time while the product and water flows under pressure. 3. There is a plastic attachment to the nozzle that is supposed to regulate the stream to either Jet or spray. It's flimsy and it flew off when I adjusted it the first time. After trying again the only setting I could get to work was Jet. I wanted Spray for my smaller area. 4. There is no way to know when the container is empty because water is still flowing through it at force, so I'm pretty sure I sprayed water on the pavers after the product was done, thereby diluting it. I would not recommend this product at all.

This product worked exactly how it was intended. Very quick and removed all of the mold on the side of the house. The only reason for a three star review is because it killed all of my plants and grass in the area I used it.

Very impressed. Had mold on north side of house in norther wisconsin. I followed the directions and patiently waited. Over time, the rain washed the mold off after treatment. I will buy this product again! Thank you.

So far so good. It has been 3 days since I applied this to my Roof. I already am finding small pieces of dead Moss falling off my roof onto my deck. The moss has gone from green to brown. It was easy to apply and was a very fast process. I ordered another bottle to finish the rest of the roof. The only hard part was getting the hose up the on the roof. It comes out with Suds like soap so it is easy to see what is done. If something changes I will update this