Since printer is partly mechanical, it requires more maintenance. 1. Clean the exterior of printer using soft cloth with mild organic solvent. 2. Do not place printer near heat generating machines such as heater and furnaces. 3. Periodically, clean out dust, paper fragments and dirt from its mechanism using soft brush. 4. Check that the paper feed path is free of obstruction and clean paper feed path, platen and ribbon path with soft cloth 5. Check an clean the print head and ink cartridge. 6. Denatured alcohol can be used for cleaning the inner parts such as stepper motor, printer head etc. 7. Test for the satisfactory print quality. 8. The mechanics of different printers vary with their types. So consult their manual for their PM.