I am totally in tune with cleaning and protecting the exterior of my cover with marine protectant like the one Doc sells. However, after 3 months, I am starting to feel a slick film on the interior of the cover, especially where the cover rests on the fiberglass of the spa shell.
I have since wiped it with a clean rag towel, but I am a bit apprehensive to introduce anythign to the water that I don't have to (my water is in balance and clear, and I am proud of my achievement!!) to clean it and I assume if it is inside the skirt, it will get into the water.
What do y'all do for this?!?!?