1. the safest method: with a utility knife from the oblique cutting a small opening on one side of the bubble, then use the squeegee and bake guns scraping.
2. tore it in half, and then slowly up, come on.
3. bubble pricked with a needle and press flat.
4. dry paste method, inevitably there will be bubbles, don't panic ~ small b and I can tell you way: first the small bubble squeeze squeeze with your fingers, squeeze as much as possible to go. Then use needle, or
Cutter head, gently poke and finger press the bubble is gone. Some very small bubbles, you can ignore them. 1-2 days Sun, through the increase in temperature, the air inside will spill from the material! absolutely flat!