My house has a built-in oven that I've never used since I moved in ~10 years ago. (I prefer to use the oven function of a combi-microwave.)
My wife, who has just moved in with me, wants to use the big oven but I'm rather worried about safety since its been standing there untouched for so long.
Assuming the thing even works, should I have it cleaned first?
(It's a fan assisted electrical oven.)