Clean the window surface thoroughly, spray with water and then wipe with a piece of kitchen roll. Cut the film using a knife 2-3 cm bigger than the size of the window. The film has a very thin clear backing liner. To remove this get 2 pieces of adhesive tape and apply one to each side of the film in a corner, pull back on one of the tape pieces to start to remove the backing liner. When the backing liner has been removed use a bottle spray and coat the adhesive side with application fluid or soapy water. Apply the adhesive side of the film to the window. Spray the film with water, this will allow the squeegee to glide along the film’s surface. Begin at the top, and squeegee down from the central part towards the edges. Cut the film again, now to the size 2mm smaller than the window so it does not touch the frame, and glide with the squeegee once more. These films are produced under careful quality control and are warranted to be fit for the purpose and free from defect in material and workmanship.