Hi, I would definitely replace the knife! You can find it on galaxus for chf 19.90 or on the trisa website for 16.50 plus 4.90 shipping. I have had this blender for several years, apart from a gasket, the knife is the only part that wears out. Best regards.

Dear Michaela, it is best to buy new ones! After several years of use, I would replace the knife... LG S.

Trisa Knife