I thought my 20 year + double oven range cooker was clean untill i got chelmsford oven rescue in to clean it .they striped it down took parts outside to clean them ,i always thought the fan was black until cleaned turned out to be silver ,
It now shines inside and out .I have booked them to come back in 3 months to clean again well worth the money Highly recommend
Thank you Chelmsford oven rescue