To remove potted plant stains, apply a mixture of dish soap and water to the stains, and scrub them. If the stains are still there, cover the stains with some dry detergent, leave it for 10 minutes, add hot water, and scrub the stains. To remove moss and algae stains, apply Simple Green, scrub the stains, and rinse them well with a hose. You can use distilled white vinegar instead of Simple Green.
To remove a new red wine stain from a cement surface, rinse it off with a large amount of water. If the stain is old, dissolve several drops of tea tree oil and glycerin in several quarts of water, apply the liquid to the stain, and leave it on for 20 to 30 minutes. Apply more liquid if it dries. Scrub the stain until it's gone.
To remove a mildew stain, mix 1 quart of chlorine bleach, 3 quarts of water and 1/3 cup of powdered laundry detergent. Cover the stain with the mixture, leave it on until the stain turns white, and rinse it off.
To remove sidewalk chalk stains, scrub them with a wet brush, rinse off the chalk, cover the stains with Soft Scrub, and scrub the stains in circular motion. Rinse the stains.
To remove coffee stains, mix 1 part glycerin and 4 parts water, and scrub the concrete using a sponge. Rinse the stains.