The Nozzle Wiper is used to clean up the waste overflowing from the nozzle of the printer. It consists of PP elastic structure, PTFE tube, and a lock screw. When the PP elastic structure undergoes plastic deformation or fracture, the nozzle wiper can be replaced. When the PTFE tube becomes loose and can be rotated, please tighten the screws to ensure that the PTFE tube cannot be rotated (be careful not to over-tighten it to cause slippage). If slippage occurs, please replace the nozzle wiper.