Like the original Dial-In, Geddex Dial-In Pocket window markers are safe for all windows (including Lexan), painted surfaces, and tires. It even still wipes off with a dry rag, or your hand. What has changed is the size. Dial-In Pocket has a smaller applicator and convenient magic marker style bottle, for extreme line sharpness and control. Geddex's extensive testing shows that a single bottle is good for well over 100 elimination rounds.