3 quarts warm water 1 quart liquid laundry bleach (Purex, Clorox, etc.) ¼ cup any powdered detergent (Tide,Duz, etc.) 2/3 cup TSP (stands for trisodium phosphate, not a brand name, found in paint stores)
Mix well and apply to surfaces with a stiff broom. Let stand for 20-30 minutes. Rinse well with a garden hose to prevent damage to plants. Wear rubber gloves when handling. This mix is also great for general cleaning on outside surfaces.