A little over a month ago I bought two sets of the Stardust gel pens. I used them once and stored them. Today I attempted to use them and all but one pen worked! It's too late for me to get a refund, but please realize that these pens clog up easily and become useless within a few days.. Mine were stored in a cool place with tops on of course. Check out my YouTube videos! I also am Meriscrapper13 on YouTube.