So I just had my oven cleaned by Ovenu. Pleased. I know that, from now on I can buy an ovenpride kit, to keep on top of it.
Well, I asked if my piece of tin foil on the bottom was o.k. and he said yes, becasue mine if fan assisted and the heat doesn't come up from the bottom, it was fine.
But he said that you could buy black sheets called 'ovenglide' to fit the bottom, or put in your roasting trays and then just take them out and wash them.
but i can not find this product. YOu know when you wished, you'd stopped someone and asked them again, and written it down, there and then ? 
any suggestions please ?