I have read several discussions on cleaning your pop up canvas the more I read the more scared I get. We have a used Flagstaff Mac we purchased late last summer who the original owner did not take care of mainly a leak in the roof vent (now fixed) causing the canvas/vinyl inside and out to have mildrew stains from this leak. The canvas/vinyl is in fantastic shape only finding one small tear that is now repaired. I want to be able to clean the canvas/vinyl inside and out side with out fear of ruining the material. My RV repair person recommended Folex carpet cleaner which he has used on awnings, however he admitted he not wholly versed in pop ups. This is a huge job and would like to work away at the inside of the camper this summer while camping and finish the out side this fall prior to closing it up for the summer. Has anyone used this product before or has another suggestion. Thank you in advance for all your help.