Purchase a new $400 spa cover about 4 months ago from "The Cover Guy" and started mildewing on the inside even though they say it was mildew treated to prevent mildew. Never had this problem with old cover.
And they refuse to cover under warranty or replace. A good spa cover does not have this problem. Please do not buy from The Cover Guy or Ideal Spa unless you like wiping up mildew every week.
I guess my saving a few dollars from buying on the internet did not work this time and will deal with local supplier in my town.
Monetary Loss: $400.