I clean my 3-season door screens and glass with the bottle of window wash that you hook to your hose. It's designed to clean upstairs windows on a house from the ground. It comes out soapy and then you turn the dial to rinse with clear water. Unlatch the doors so they swing out over the deck. This way you don't get water in the garage. I buy mine at Walmart. It's not perfect but there is no way to get the screen off to do a better job.
