Plastic Blob or Hotend Leak

Document the failure and confirm that it matches this guide: A growing plastic mass forms around the heater block, nozzle, or heat break.

Return extreme overrides to a known printer, nozzle, material, and slicer profile so the diagnosis starts from a stable baseline.

Check nozzle not hot-tightened. Stop the print safely.

Check nozzle seated against block instead of heat break. Heat only enough to soften residue.

Inspect damaged threads or heat break. Inspect the nozzle/heat-break seal.

Rule out old residue hides a continuing leak. Reassemble to manufacturer procedure.

Change only the single setting or hardware condition supported by the evidence, then run a small test that reproduces the original failure.

Compare the test against the target condition, record the successful value, and save it in a printer/material profile before repeating the full print.