Thanks for the video. While I agree those are good methods, I probably won't be messing with either of them anytime soon.
I know I could just call the dealer but frankly I don't trust them to do anything other than say "oh ya it's epdm".
I'll ask around at work maybe. We make products with tpo and epdm layers so maybe some of the guys involved with that will have an easier method.
I did read somewhere that when wet, epdm is very slick and tpo isn't. Maybe I can get some samples of both and experiment. For now I'll just be very careful if I wash it, hopefully a rinse down will do it for now because the last time I looked it wasn't too bad, just a little dirty from being outside. It's yet to see a campsite lol.