Newly applied film needs time to cure, and during that period the windows should be left alone and the inside of the glass left uncleaned. Your installer will tell you how long to wait for your car and conditions. After that, clean gently with a soft cloth or microfiber and a mild, non-abrasive cleaner, avoid ammonia-based products and scrapers, and take care around the edges of the film. Looked after this way, automotive film stays clear and even for years.
Lawrence Tesla window tinting Gentle cleaning, no ammonia, and patience while the film cures.