Steps for removing tinting: 1) Run an extension cord out to your car with plenty left over to reach inside. 2) Fill the steamer up with water, plug it in, and start it steaming (it takes a few sec. to get hot) 3) Open the moon roof, and windows of the car (to let steam out) 4) Turn on your stereo & crack open a beer
Removing stickers and other things you don't want on your windows: Follow the same steps as above and in the following steps. The key difference will be longer steaming and more scraping with your fingernail. I still do not recommend using a razorblade, but it is up to you.