How to clean tinted windows?

I paid so much for the tint, I'm paranoid about ruining it. It's been two weeks, and I still haven't put the windows down. Cold weather is a good excuse, I just stay away from the drive-thru atm.
Now that all the bubbles and condensation is gone, it's pretty obvious that the inside of the windows needs to be cleaned. What do you usually use that won't scratch or discolor it? Thanks.

[freeze12]

Use a cleaner that says "safe for tinted windows(glass)" the formula has no Ammonia or Alcohol in it.
You can get it at Wal-mart (Invisible Glass,etc)

I just use a little elbow grease...A clean soft dry cloth and buff the tint. I have never used any kind of liquid to clean the windows off, I have had my windows tinted for four years now. at most I would use a damp cloth followed by a dry buff. Don't use anything that has amonia in it!

windex is a huge no-no. it'll eat away at the tint slowly...you can use just plain water or get special spray for tints