How to remove failed tint film filled with bubbles

Method 1: Loosen the film with a steamer and then scrape off with razor blade. Clean off any remaining debris with your window cleaner   Method 2: If you don’t have a steamer, soak the glass in Windex or Ammonia and then cover with a black trash bag. Store the car somewhere hot or in the sun for an hour or so. Afterwards, remove the bag and then start scraping.   Method 3: If it’s not your car, you may be able to convince your customer to get the glass replaced altogether.