In 1882 chemist George William Hoffman created Bar Keepers Friend, now a favourite in UK kitchens for reviving stained baking trays and roasting tins. A cult cleaning powder called Bar Keepers Friend is being hailed as an under £5 product that can bring those battered baking sheets back to life. Bar Keepers Friend was created in 1882 by Indianapolis chemist George William Hoffman after he noticed that a pot he used for cooking rhubarb came out cleaner than before. In the United Kingdom Bar Keepers Friend is easy to find in major supermarkets, homeware chains and online, with most tubs and bottles sitting somewhere around 3 to 5 pounds. Glass hobs and gentler cleanersMany ceramic or induction hobs need gentler cleaners than Bar Keepers Friend.