This pen was my biggest dissapointment (skipping and other issues) until I got myself an ultrasonic cleaner and gave it a last chance. Had the pen cleaned for some days and then it was gone. Now I was very curious about the performance and yes (!), the pen was writing immediatly
After loosing my wonderful B-nibbed Pelikan M400 in the mail some weeks ago the MB 144 seemed to feel sorry for me and resurfaced. At least I have not lost 2 pens during this summer!