My buddy owns a Tint shop in Philadelphia. I help him some days a week, and he has done my car.
You can go to any car parts store(pepboys, autozone, ECT. . )
and get glass cleaner that says "safe for tinted glass"
What ever you get MAKE SURE it is AMMONIA FREE!!!!
Ammonia will turn your Tint film PURPLE!!
LOL, trust me, I have seen ALOT of people and I am sure you have to that have purple windows on there cars. Thats not how it came!!!
Good luck, and enjoy your tints!!