Shop for Cleaning at The Home Depot. Spray & Forget is a unique No-Rinse exterior cleaner that is easy to use! Spray and Forget works on all types of exterior surfaces to remove green and black stains caused by algae, mold, mildew, moss, and lichen. You simply Spray it on and Forget it! The green and black stains will disappear with subsequent rainfall over time. It is a superior product that is easy to use, maintenance free, and only requires one application. Spray and Forget is eco-friendly and does not contain bleach, acid, lye or phosphates. Use Spray and Forget and eliminate the need for damaging pressure washing or laborious rinsing! Spray and Forget is biodegradable, non-corrosive, non-acidic, non-caustic and has a near neutral PH so it will not damage your windows, gutters, awnings, patio furniture or cars! It also works to prevent the stains caused by biological growth from returning. Spray and Forget, Itâ€ s that easy! Look for the yellow label.