Firstly we would like to thank you for purchasing the BergHOFF Eurocast Professional Series of Cookware and we are positive you will have many years of healthy, fat-free and successful cooking from them. If you have registered your purchase warranty and are still within 5 years of your purchase date and you meet the warranty conditions set out then contact us immediately by email: sales@berghoffgb.com if you are experiencing an issue. In your email, please advise us of the style of pan, its size and when & where it was purchased and we will aim to contact you within 2 working days to try and resolve the issue.