It doesn't matter. I had my driver seat cover replaced under warranty for this issue and the new seat cover is doing the same damn thing. I never have a wallet in my back pocket. Just the wonderful Ford "leather".
Lol this never gets old. Just my humble opinion - Providing you like a few channels - then the best thing to do is to call a week before you trial expires and tell them you want to cancel. They will give you their best deal to keep you. I have been doing this since 2009. Never fails and...
I take mine to the dealer I bought it from. They have been really great to deal with and have taken care of me. I do the full synthetic "package" which comes out to about $80. While I have a warranty I have all my service done with them. Yea I know, bit for me it's peace of mind.