Reflective window film is a popular option for homeowners who want to save money on heating and cooling. The colors, styles and thickness can vary greatly from one manufacturer to another. Installation also varies from one manufacturer to another, including both the kinds that just press on and peel off to the types that are applied with an adhesive. If you want a film that is easy to remove, you should choose the type that is pressed on and involves no adhesives. You can remove this type by simply peeling it away, and there will be no adhesive to clean from the windows. It is also reusable. If your window film was applied with an adhesive, you may need to get a specialized chemical solution to remove it.