Well it is requiried to apply the stickers to the back window and was wondering what would be the best way to clean before. I also play on applying aquapel to the back window. My student sticker is on the outside and apartment is on the inside. I have a heated rear window and am afraid a sticker will mess up when applied. I polished the windows 2 weeks ago with Autoglym Window polish so I was thinking of wash, plastic razor, clay, NXT window cleaner and maybe IPA wipe down so there is nothing on the window. Should I apply aquapel before or after the sticker?