What is the best way to de-ice slide-outs

We were caught in a TX icestorm two winters ago that left 2" of solid ice on everything. Shut down roads, campground, and everything for two days. Fortunately for us we didn't have slide-awnings as one camper had a mess with that. Even more fortunate for us was that we could just stay an extra couple days and the temperatures started to warm enough that escaping heat from camper started to melt enough that I could lift off large slabs of 2" thick ice. If I had to pull the slides in earlier I don't know what I would have done, but windshield washer deicer is probably my best guess.

I'd do my best to pull slides in before an icestorm in the future. Good luck!