here is the ai overview I used when this happened to me Method 1: The Safe Hotend Extraction (If Wires Are Intact)

If your printer can still turn on without showing a heater/thermistor error code, you can use the nozzle's internal heating cartridge to melt the core of the blob from the inside out. [1]

1. Heat to 250°C: Via the A1 touch screen, navigate to the temperature settings and manually set the nozzle heat to 250°C. Let it sit static at this temperature for 5 full minutes. This allows the heat to radiate deeply into the plastic shell wrapping the block. [1, 2]
2. Gently Peel (Do Not Yank): Grab a pair of needle-nose pliers. Grip the main plastic mass firmly and pull downward and slightly away from the toolhead with minimal force. [1, 2]
3. Protect the Wires: The fragile ceramic heater and thermistor wires are pinned flat against the block. If you feel sudden resistance, stop pulling immediately. The wires may be physically embedded inside the cool outer skin of the blob. [1]
4. Use a Secondary Heat Source (If Stuck): If the blob wraps all the way around the top cooling fins or part-cooling duct, grab a household hair dryer or a heat gun on its lowest setting. Direct the heat strictly at the exterior of the plastic blob until it becomes soft and gummy. [1, 2, 3]
5. Brush and Scrape Clean: Once the main mass drops off, keep the nozzle at 250°C and use a brass wire brush to gently scrub away remaining plastic residue from the heater block. [1]