Today I have new video about skipping problems. (Sorry it is in Turkish) But briefly speaking, skipping mostly caused by oil residue in the production line. Therefore, add a drop of dishwashing liquid to a luke warm water and stir it without making bubbles. Fill and empty your pen with it several times. Then rinse your pen with clean water. The problem will cease, if not contact your seller because problem might me in your feed.
Zeynep Sorry I am not native in English