PETG is the most commonly used form of PET (polyethylene terephthalate)

Roland BN-20 og Roland GS-24

available for all formats on the FLUX machines

so it is a good idea to change to a more durable nozzle - see this link

QIDI Tech - Hotend Silicone Sock 5pack - Q1 Pro Sovol - SV08 - Reservedele PETG is the most commonlyQIDI Tech Hotend Silicone Sock 5pack Q1 Pro These silicone hotend socks are specially designed for the QIDI Tech Q1 Pro and ensure optimal performance and durability. Made from high quality, high temperature resistant silicone, they can withstand temperatures up to 350C, making them ideal for advanced printing tasks. Effective temperature protection : The silicone prevents heat loss and ensures stable printing temperatures. Long lasting nozzle