The main factors in spa cover deterioration are sunlight, dirt, and acid rain. Fortunately, there are now great products available to protect and clean vinyl covers, and greatly extend their life. Select a cover protectant that contains a UV blocker for fade resistance and use a good cleaner such as Clean All. Regular use of spa cover protectant such as ‘303 Protectant’ will keep the vinyl supple, prevent cracking and fading, and seal out damaging moisture. Avoid products which contain silicone oil– these will actually cause premature failure of the vinyl, when exposed to sunlight. We recommend 303 Protectant because it is the best product of its kind we have found, and is also Earth friendly. Don’t forget to clean and treat the inside surfaces of your cover as well– this is very important.