That's what I did!!!!doolyd said:Mine does this from time to time. You need to lube the zippers and pull and tug on it until the zipper pull comes free. Often you have to work it some each way and pull down or up on the window right next to the zipper pull. Check the teeth to see if any are bent or broken before you do this so you don't bind it more. Work the zippers so that you are working it toward where it unzips entirely so you can take the window off. Get a tooth brush and clean the teeth, re-lube and then put the window back in. Sometimes mine seem like it won't budge but with a little persistence, it does.