invest in a vinyl scraper. thats definitely not that its called, but its a hard, but soft thing that you press and scrape on your sticker to get the air bubbles out. is the bubble is big enough, poke a tiny hole and the air will escape. but i would suggest using somehting hard, but not sharp, and just going slowly, and just glide the hard thing on the sticker and theyre should not be any air bubbles.