How do you remove old auto window tinting?

I have a old Lexus and had the windows tinted ten years ago. It's my commuter car and needs to last a couple more years. The drivers side window is getting hard to see thru. Any suggestions??|||go to your local store and get box knife razor blades and probably a bottle of rubbing alcoholand start scrapin then wipe the adhesive of with a rag and the alcohol on it have fun caz its a pain but thats the cheapest way to do it i think they might make a liquid tint remover|||Rubbing alcohol.|||belt sander