I clean my oven in stages: put all the racks in the oven cleaning bags I buy hopefully in Poundland. Then spay the oven floor. Then think, Gosh I'm exhausted. Pour wine.
Repeat over 2 weeks until I'm desperate to make a casserole or bake peppers, and then get water everywhere & hope that the racks haven't corroded.
I'm at Stage 2: racks are shining, oven floors still grotty. And let's not talk about the glass doors.
Can only eat shop-bought cake. The shame