Their customer service is great and should replace it for you. I had zipper issues with my first XTH Resort, and they sent me a new one, which I sold, then bought the XTH Pro. A trick that I've learned, is to pull the pole closest to the zipper in a little bit when zipping the bottom zipper of the door. It alleviates the pressure a little bit so that it zips easily and doesn't strain the zipper at all. Keep us posted...