Clear scraps from the chamber and nozzle area before printing. Clean each sheet by the method Prusa gives for that surface and keep grease away from the print face.
Inspect fans, the side filament path, Nextruder and door without dismantling them. New noise, belt debris or repeated self-test failure deserves the matching diagnostic.
Use Prusa’s CORE One maintenance hub for lubrication and belt procedures. Kit instructions are not a maintenance schedule for an assembled printer.
Run the maintenance wizard when firmware requests it and record what was serviced. Do not ignore #31116 or #31117 indefinitely; the warning exists to confirm that the named maintenance was completed correctly.
Regular care postpones, but does not eliminate, the need for parts replacement — when a nozzle finally wears out, the CORE One nozzle replacement guide walks through the Nextruder disassembly safely. For general nozzle-clearing habits that apply across printers, see how to clear a clogged nozzle safely, and if a maintenance warning like #31116 keeps recurring, the CORE One error code index explains what that specific code expects. The MK4 runs the same routine-upkeep logic behind a different five-digit scheme, covered in the Prusa MK4 error code index.