I cleaned the grid with rubbing alcohol and a microfiber cloth and then put it on after 5 minutes. The tape is cut about every 3/4 inch, but not all the way. After reading some of the reviews I figured I would have to remove 50-100 little stickers for each. There was no such thing. Only four out of five stars because there is no cut-out to open the hood. I'll do it myself so it's no big deal.