I've never had an issue with stick-ons, just had some installed today [for my non-Mustang]
There must be some type of residue on your wheels or they are using weights with defective adhesive.
I'd clean the wheels with acetone and bring them back, they should honor their work.
There must be some type of residue on your wheels or they are using weights with defective adhesive.
I'd clean the wheels with acetone and bring them back, they should honor their work.