some kind of soap-ish solution to spray on the window. wihtout it, your screwed, dotn even bother. i know at pep boys (near me at least) they sell kits with a razor, squeegee thing, the soap crap all together
Get a spray bottle fill it with water and add some dishwash soap.
Scrape the windows with a razor and lots of water (do not use a razor on the back window).
When spraying your windows you can never use too much water (the wetter the better).
Do not seperate the tint yet.
spray the hell out of the outside of the window you wish to apply the tint to.
Lay the window tint on the outside of the glass, smooth it out and cut with a razor knife to fit (make sure the tint is facing the right way).
Push the rubber that meets the window at the top of the door panel down with a kitchen spacula.
Spray the inside of the window with alot of water, then seperate the tint apart spraying with water while you seperate.
Place the tint on the glass and spray the tint with water and smooth the tint out (work from the middle out to the edges).
You can use a blowdryer on the edges once you are done smoothing the tint.
Don't roll down your windows for about 3 days.
Enjoy
All you need to do is fill up a spray bottle (not an old windex bottle) with a teaspoon of soap and then the rest just tap water. You should probably clean off your windows with this solution at least 2 times before you apply the tint. Then just spray down the window, and the backing of the tint and apply it, squeegee out the bubbles, and cut according to fit, and you are good to go. Dont use a windex bottle for the solution because there may be a little windex still in the spray bottle, and that will ruin the glue on the tint. Same thing goes when you clean your tinted windows, no ammonia based cleaners, good luck man.