X2 - Avoid any harsh cleaners like GooGone etc. I use a little Dawn in a bucket of warm water. It removes the dirt that seems to splash up from the big slide-out when it rains and we pack up.
I have some dirt/spots on my ceiling what is a good solution to use to clean it?
Is it spots from (?) you did or is it glue coming thru from the upper side? Are you the (1st) owner? There were some issues that F/R is correcting with these units. Youroo!!