The op bought new wipers but if its just the blade thats worn out try one of these, works great.
https://ecocut-pro.de/en/?gclid=EAIaIQobChMI_PChzoTj3AIVzed3Ch31RAqkEAAYASAAEgIw__D_BwE
https://ecocut-pro.de/en/?gclid=EAIaIQobChMI_PChzoTj3AIVzed3Ch31RAqkEAAYASAAEgIw__D_BwE