If you want to put the sticker inside (to protect it) plus have it face the correct way, don't use the sticker's adhesive side to stick it to the window. Get some clear tape (something strong like packaging tape would work) and tape it to the inside of the window. For a clearner look, cut the tape in the shape of the sticker... it would have to be a bit larger for overlap, of course. Yes, I'm slightly obsessive compulsive about these things...