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. For cleaning the Bohème, separate instructions can be found in the forum; decisive is 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.