1. Heat the nozzle to the standard printing temperature to soften any residual filament inside the hotend.
2. Carefully unscrew the existing nozzle using a socket wrench or dedicated nozzle tool while holding the heater block steady with pliers to prevent damage to the hotend assembly.
3. Install a new, clean nozzle of the same diameter and thread specification.
4. Tighten the new nozzle while the heater block is at operating temperature to ensure a proper, leak-free seal against the heat break.
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