If they are the original style, and you are trying to take the wiper off and leave the arm on the car, then you need to get a hold on both ends of the blade and bow them up agianst the tension of the spring that holds them agianst the wind sheild. This will disengage the latching device that is at the arm pin. It may not br easy to get off. I had trouble with mine in the autoparts store parking lot. They wouldn't come off and I went into a fit of rage and just rung them off and threw them across the lot. Then calmly walked in and bought new wipers instead of refills. Good luck.