Black inks count across manufacturers as problematic and can on the Bohème more frequently lead to difficulties; a switch to blue-black or blue is recommended. With persistent problems, the visit to the specialist retailer is sensible, since an on-site check helps most. When cleaning the Bohème, it is decisive that no water reaches the mechanism. Anyone with questions about components like the front body sleeve or wishing to delve deeper into the topic can additionally use a factory visit or a local collectors' table.