To prevent your window cranks from dying, just roll the window up and down gently don't slam the window to a stop, particularly at the top. When closing the car, wind the window up near the top, open the door, wind it the rest of the way up, then close the door. The most important area in the car to treat with Armor-AII is the window sealing rubbers -- don't forget that the sun gets to them right through the glass of the window, and it costs the equivalent of two Xas tires to replace them!

Author: David Wing