The pen worked OK the first time but even stored in the upright position I have been unable to get it to work the second time. This is the second pen and it didn't work any better than the first.Looked up papermate and found Sanfordcorp.com. Decided to send them an Email to see if they knew how to unstick the pen. Got a reply in less than 2 hrs asking if I wanted a replacement, to mail the pens back so they could find what was wrong and an offer to pay for shipping. Or if I still had the receipt, a refund. Pretty darn prompt for any business nowdays. I'm impressed.