How to clean your inflatable projection screen
Here is a selection of best recommendations by the leading manufacturers of inflatable movie screens: Open Air Cinema, AirScreen master distributor and Epic Outdoor Cinema.
All of the screens that Open Air Cinema have on offer now have a removable surface.
If you have an older model screen without a removable surface, you will want to use environment-friendly soap and warm water. Scrub lightly on the stain with a toothbrush. Then, air dry.
Another option that the team over at Open Air Cinema recommends is to inflate your outdoor inflatable screen, clean it using a high-pressure cleaning machine -- with the minimal distance between the screen surface and the high-pressure cleaning hose being 30 inches -- then air dry.
Otherwise, you can detach the screen with the zipper and wash on low in the washing machine, again with environment-friendly soap. Then, air dry again.
Ideally, you could take the removable surface to the dry cleaners in your area.
For their Elite 40' screen, the Utah-based manufacturer recommends using high-pressure car wash. Wash the jumbo screen inflated making sure the water does not get inside the air blower or the electrical extension cable. Lean the screen a bit to reach the top of the projection surface. Your inflatable screen needs to be dried completely afterwards before the storage.
Note that there are different kinds of soap that can be applied. The rule of thumb is to use the type of soap that you wouldn't mind washing your hands with (in terms of chemical aggressiveness).
The team over at Epic Outdoor Cinema advise against using harsh cleaners. They recommend using damp cloth for touch up cleaning. For anything stronger, they suggest you use a product like Vinyl Clean Plus. Silicone based products are not recommended.
Finally, AirScreen's master distributor behind the first 100' wide inflatable movie screen in the United States recommends three cleaning methods here.