I hope you'll excuse me for being so disorganized. I've been searching through my notebooks and finally came up with the recommended formula. To remove film: 8 oz. water 4 oz Ammonia 1 tsp liquid soap Spray it on and let it soak in real well. ( I don't have the soak time) Repeat when signs of dry spots appear. Remove with nylon scratch pad. Donald 84 4Ks