For those of you, like us, who use the shower in your trailers, we have found using Gel-Gloss on the bathroom walls makes it a lot easier to keep clean. It seems to help water sheet off the walls so they dry faster. It is a wax product, so that it helps things not stick to the surface. It is not the most fun to put on, its just like waxing/polishing the outside of the trailer, but it seems to last for quite a while.
(I only remembered to post this as its my job to do the home shower and was "gently" reminded it needed to be done)
Eric (and Mary who is in no way responsible for anything stupid I post)