In the middle of replacing the center muffler. I removed all the bolts at the front flanges and have the rear clamp off but can't get the rubber hangers off. I thought this was going to be the easy part.... They are in good shape if a bit stiff from age. I tried spraying with soapy water. I even tried some grease but can't get the rubber off the frame rods. Is there a trick to prying them off? I could try cutting off the rods that are connected to the old muffler to maybe make it easier but wanted to check in for advice first.