Awning fabric cleaning?

[kuba122]

This is the method I am going to try:

https://www.youtube.com/watch?v=-xoImLGI920

[jack69]

No help here on this? I'm curious too as I want to clean mine properly.

[Fundamental]

My StarCraft AR one 15 RB camper awning needs serious cleaning, stained from closing it up while wet, mildew stains basically. Anything that will take it off without damaging the material?, Any help in this regards would be greatly appreciated!