For best results...

Avoid exposing your newly applied decals to water for a minimum of 48 hours. To ensure the durability of the decals, it is recommended to allow ample time for the adhesive to fully bond with the windshield/window surface.

Refrain from using your wiper blades on the decals until they are completely cured. Once the decals have properly adhered, there is little risk of them being removed or damaged by regular wiper blade usage, provided they were installed correctly. 

Do not install in or during extreme weather conditions(rain, heat, etc.)

STEPS

1. Use rubbing alcohol and a clean cloth to remove any wax or dirt from the surface.
2. Peel off the paper backing from the sticker. If any part sticks to the backing, gently press them together and try again.
3. Stick the sticker onto the surface, starting from the center and pressing outward with a cloth or soft card.
4. Use the soft cards edge or finger under a cloth to firmly press the transfer tape onto the sticker.
5. Slowly peel off the transfer tape at a 45-degree angle. Avoid pulling it straight up to prevent damage.
6. If the sticker starts to come off with the transfer tape, press it back down and try again. If it keeps happening, the surface might not be clean enough.