I have provided several windows with the film. Although I was well equipped (spray bottle, Felt Squeegee, craft scalpel) took me for the first window almost 1.5 hours alone. The result was rather sobering (jagged edges, slight blistering). In the second it went much faster (20 minutes) and the third was perfect in less than 10 minutes. One must know how just! My Advice: - Cut the foil very generous. Do not attempt to measure in advance and precisely cut, which is nothing 100%. Clean the window with Sidolin and microfiber cloth - - Spray the window with the spray bottle (water) really wet, until the droplets run. Even the frame Spray! - Remove the protective film from the main film. CAUTION, the attraction here is enormous. If you're wearing fuzzy clothes or working in a dusty environment, can the film then throw away. Smallest lint or dust particles can not avoid that we see later but barely (frosted glass optics) one - The drawn film with the smooth side put gently upwards for example, put on a chair or on a table. - The film also spray until well everything is evenly wet - Now the foil generously to the window frame place (!). As soon as the film itself comes into contact with the disc, she sucks tight. A displacement of the film is possible. The best the film keep tense and right and left first press on the window frame (!). Below it should also overlap two cm. The foil should not come in contact with the disc case. - Then gently in the middle of the film press (second person to ask or just take the head;)) until they put on the disc from the center to the edge. - If you now wait a moment, the film draws to the frame as if by itself on the glass. Now you can release the foil and press the edges in peace and cut with a scalpel. - If necessary (foil too loose at the edge) can ever "wegrakeln" some water, which facilitates cutting. - The water is rausgerakelt per Felt Squeegee from the center to the edges, it is very simple and is almost meditative.