Have had my 15% tint on for about 2 months, went outside this morning and the front passenger window had about a 3 inch bubble surrounded by other small ones and all the other windows had minor ones. We were recovering from a very humid hot and rainy 2 days and my windows had been cracked allowing a little moisture in but still, a good installation would have prevented this. Now I have to go to the guy and tell him to take it off and re-do it for free (hopefully).