If you enjoy fixing things in your car by yourself, keep on reading. 1 get a car with bayonet clip wiper blade; 2 check out if your windshield wiper is bayonet type; 3 if your wiper clip isn't bayonet type, go to step 1; 4 print the stl file; 4 Raise the metal windshield wiper arm away from your car’s windshield until it stays in place. Make sure that you are careful at this point, because this metal arm is spring loaded and may come crashing down against the glass, which could cause a crack. 5 with stl printed, and with the windshield arm perpendicular to the ground, take the new printed clip and insert it into the hook of the arm, raising it away from your hood until the plastic hook piece snaps into place with your wiper arm. Now you have changed your wiper blade clip! Slowly allow the arm and new wiper blade to settle against the windshield.