Had Jonathan of Oven Wizards Bury to clean by double oven and extractor !!
Had used another oven cleaner , but they refused to clean the extractor and the racks were left dirty !!
No such problem with Oven Wizards, oven was left like new and it is a few years old !! The extractor was left clean and hygienic and smelling sweet !
Fabulous job Oven Wizards, see you in a year !!