I'm a signwriter, there pritty easy to fit, even easier because their so small, I'm guessing that there sent out with application tape fitted (its either clear or more likely looks like masking tape), either way, as said, you have to give them a dam good rub first. then turn them upside down and peel the backing from the application tape, NOT THE APPLICATION TAPE FROM THE BACKING! you won't need water to fit them, make sure there is no grease/dirt on the window, use window cleaner or better, IPA if you have acesss to any. then hold the application tape at both ends, get them where you want them, stick one side to the glass and rub down to the other side. if the letters are still comin off, walm the glass up, either with a air dryer or just press your hand onto them for a min or two. then slowly peel off the application tape. DONE