Sorry about your problem.
I have reported the following before before... in 2005 I was told by Jim Allen, customer service manager at Lance Campers factory when I asked for recommendations for a cover for my 2003.
He told me "Do not use a fabric cover at all" He went on to explain that the covers trap moisture, mold, dampness, etc causes filon failure.... and chaffing or abrasion in the wind.
I told him that I had read the cover manufacturer's claims... Jim said "Sure, they are selling covers"
I have reported this a few times on the forum... I don't know of anyone that ever paid any attention to it... except me.
I saved up and built a carport... 18' X 37', 12' high... $3500 total tax and all.
I wish everyone would take Jim's advice...
Chet