Notice:
1. Stick them on your car after a week if your car has just waxed.
2. Never stick them to your car when your car is hot.
3. Cleaning the region of your car where you want to sticked.
4. Never wash the car within one week after installation!
5. Never put the car under the hot sun within 24 hours after the installation!
6. Never stick them in the rainy day.
7. If you don't want to stick them by yourself, you can ask the 4S shop for help.
8. Use hot wind blowing can easy remove it, will not damage your car paint.

When you place it on your windshield there a bunch of air bubbles?
You can remove the paper backing from the decal slowly and then from left to right (Or right to left) slowly smooth on the decal with a smooth credit card like object that will help prevent bubbling until entire decal is on, run over the decal again with object to smooth out completely.