Park the car in direct sunlight or warm the glass with a heat gun or hair dryer
Lower the window slightly if possible
Peel up one corner of the tint film with a razor blade or fingernail
Pull the film off slowly at a shallow angle
Reheat stubborn areas while peeling
Spray adhesive remover or soapy water on leftover glue
Scrape off residue with a plastic scraper or razor blade held flat
Wipe the glass clean with microfiber towels
Clean the window with glass cleaner
Repeat on all tinted windows