But I must've done it wrong cos it hasn't really worked. 
I have an inklng that I didn't put enough on. I was concerned about it dripping off. I left it overnight too as I haven't cleaned the oven in this house before. (Don't judge me. We moved in 8 months ago when I was 7 months pregnant and had DS who was 15 months. Lots of other things to worry about then) I have no idea when it was last cleaned.
The other thing is, do I need to do anything more now. I've wiped with paper (yuk, yuk yuk) and rinsed with water and wiped thoroughly with a cloth but, because it's still grotty looking I'm worried about residue when we need to use for eg. the grill pan for roasties on xmas day.
Help please.