When winterizing your car's wipers, wet the windshield first. This helps protect the glass while making sure the wipers stay working properly. Facing the wipers, turn them on and see that they cross the glass several times before shutting them off. Make sure they park parallel to the windshield as you do this. Gently slide the armway from the windshield, push down on the latch that holds the wiper arm in place, and let it fall while holding it away from the glass. Pull the wiper arm over, press it down a little, and shake it to release it from its connection. On installing the arm, lower it onto the post until it parks at a height safe for normal use above the base of your windshield. When it fits into place, check that the latch locks smoothly into the groove in the wiper spindle. First, for the back wiper, put it in the parking space. Take off the cover for the pivot to find its mounting bolt, then unwrap it and remove the arm. The installation follows the previous steps in reverse order to put the arm in the right place on the motor.