Cleaning and maintaining our hot tub covers is very straight forward. Keep it clean and inspecting it often can go a long way.
Keep the cover clean. The vinyl needs to stay clean and conditioned. Use a mild soap and water solution to clean the vinyl of the cover at least twice per month.
Clean off any chemical film from the underside (liner) of the cover. This film or residue can break down the material causing water vapours to penetrate the core.
Unzip and clean the inside the zipper areas. This area can be a zone for mold and mildew to accumulate. Use a mild cleaning solution to clean this zipper area.
Clean and moisturize your hot tub cover ever 2-3 months. Once per season is a good idea. Do not use petroleum based products or cleaners with silicone as they may dehydrate the vinyl and degrade it quicker that usual.