What happens next?

How to remove stickers from your car
Set a bucket of soapy water next to your car.
Dip a wash rag into the soapy water, and wash over the sticker several times. Make sure to wash the area surrounding the sticker as well.

OPTIONS:
(A). This action will soften the sticker. Spray the sticker and the surrounding area with a tar removal substance.
(B). Grab a clean cloth and a bucket of soapy water. Dip a clean rag into the soapy water and wipe over the sticker several times to remove any dirt, dust, or nasty grime.
(C). It's helpful to also wipe down the sticker and the rest of the car afterwards. The rag will help your scrub the entire sticker, making rinsing much easier.
(D). Make sure to do the same for the bumper sticker and the starter sticker if you're going to use these surfaces for the sticker application. Dip a dark plastic or metal sponge or rag into the water and scrub.
(A).