Often, window film won’t stick if the glass is too dirty; dust and debris can prevent the adhesive from working. Make sure to clean the glass thoroughly before installing the window film. Low-quality film, which may have a weaker adhesive, might also be the cause of your window film’s inability to stick.

The most popular way to remove home window tint is by using a hairdryer. Most people already have one in their home, but if you don’t, you can buy one for as little as $15. All you need to do is turn the hairdryer to its hottest and highest setting and run it over the window tint for a few minutes. Then, you can easily peel it away. You may need some goo remover for any leftover adhesive, but this DIY could be free for many people.    

Use a combination of blackout methods to truly black out your windows. If you want to eliminate all light from your room, try installing a very dark tinted film and then putting up blackout shades over the entire window. Reach out to a professional and request some custom-made shades for the best result.  

The lifespan of window tinting depends on several factors, but a high-quality, professionally applied tint can last anywhere from 5 to 25 years, with premium tints lasting at least 15 to 20 years. Key factors influencing longevity include the quality of the film, the professionalism of the installation, and the type of window. Some companies offer lifetime warranties, while others may only provide a one-year warranty or none at all, so it's wise to verify this with your service provider. To prolong the film's life, clean it gently with a microfiber towel and mild cleaning solutions. Avoid harsh, abrasive, alcohol-based, or ammonia-based cleaners, as well as sharp tools or scrubbers, which can damage the surface.