Dear All, From time to time I see some people have problems with their twsbi pens, most of these problems can be fixed by receiving new parts (or improved parts) from us then do the self service. But I also see some people cannot resolve the problems by this way. If you really cannot fix the pen by yourself, PLEASE, do send the complete pen back to us, so we can service it for you without giving you more trouble. We are not perfect yet, but we are moving toward that direction all the time. Cheers speedy