People who have used Spray and Forget roof cleaner generally report mixed to positive feedback, with most positive reviews coming from homeowners who are looking for a low-effort, no-rinse solution for algae, moss, and lichen stains. Many users on home improvement forums and retail sites appreciate that Spray and Forget does not require pressure washing, which can damage asphalt shingles by stripping granules. They note that it is easy to apply with a garden sprayer and that it works gradually over weeks to months as rain and wind slowly remove dead growth. Positive comments often mention that it effectively removes black algae streaks and green moss without bleaching shingles or harming plants when used as directed, unlike harsh bleach solutions. However, some users express frustration that results are very slow, taking 2 to 6 months to see full cleaning, and that it is less effective on thick, established moss that may need physical removal first. Some also note it is more expensive than homemade bleach and water solutions. Roofing professionals often caution that while Spray and Forget is gentler than bleach or pressure washing, any chemical should be used carefully, rinsed from gutters, and not relied upon if the roof has widespread damage. Overall sentiment is that it works for maintenance and light to moderate growth.
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