Open the maintenance box cover. Pull out the pad. Wear gloves. Squeeze the ink out into a bucket. Let it dry in the sun for 24 hours. Reinsert. Option B (Cheap): Buy a generic maintenance box for the M2120 on Amazon or eBay ($10–$15). Replace the old one.

: Remember that resetting the software counter does not physically clean the waste ink pads. To prevent actual leakage, you may still need to replace the T04D1 Maintenance Box or Ink Pad Felts . Verdict

Beyond resetting the waste ink pad, it can perform print head deep cleaning, EEPROM initial settings, and head ID settings.