My KitchenAid blender coupler melted onto the blender and was completely destroyed. Following the video supplied by AppliancePartsPros.com, I used a screwdriver to carefully pry the broken coupler off the blender. Then I used a plastic scrubbing pad to remove all of the rubber which stuck to the blender. Finally I simply screwed on the new coupler, tested the blender, and voila, it was fixed!