What to do about broken defroster lines and how to prevent it

Method 1: Some vehicles like certain Mercedes, Camaro, and Cayenne models have delicate defroster lines that can come off when taking off old tint film while not even leaving any leftover adhesive. Unfortunately, the only way to fix it is to pay for a new window or try to get the company to warranty it. Preventing it is hard, as some models are just not designed for this task. In general, you can minimize your chances of pulling the defrosters off by using plenty of steam and moisture to slowly disconnect the film from the glass.