the rear wiper will start to make the edges/corners come off. either dont use it or disconnect it.
ive done the vinyl thing quite a few times in my day, with truck clubs and people ive known who've owned vinyl shops.
here's a little advice to make it go on nice, easy and straight!
1. first clean the window with windex or whatever.
2. get a spray bottle and fill it with water and add a little dish soap to it.
3. spray the area where the sticker will go liberally.
4. apply the sticker
5. use a credit card to push out any air bubbles and excess water.
6. allow to dry over night. do NOT drive the car, they may fly off or move.
*it should dry perfectly with no air bubbles. if there are any the next day, slightly cut them with a razor.
the reason for the soapy water is that it allows you to slide the sticker around until you get it riiiight where you want it.
it will have ZERO effect on it permanently.
nothin like trying to place a big vinyl sticker just right and accidently putting it on crooked then trying to peel it off so you can try it again.
get rid of it before it's too late.