Make them get off their duffs at the part store, and go into the back room and get you some refills. Went through the same thing. They tried to get me to buy those cheesy plastic arms. NO, NO, NO!!! They should have the refills there, just too lazy to go look for them in the back. (Try a couple of places). Squeeze that tab at the end of the wiper, and pull it off. (I always put a towel or blanket on the windshield, in case that wiper arm slips out of your fingers). Turn the ignition on, bring the arms up to a good position... when they get where you want them. shut the key off. Just make sure that the grooves of the new blades slide into each tang. Easy.