It is recommended to first fill the fountain pen with water over several days, since often dried ink is responsible for the stiffness. The use of silicone grease is expressly advised against, since it adheres extremely strongly to almost all plastics and can only be removed with aggressive agents. Independent interventions on the mechanism mostly fail because the necessary special tools by Montblanc are not available in free trade. If the water bath does not help, only the way via Montblanc service or a specialist retailer remains, who can carry out simple repairs on the spot.