Applying principles from Heston B's Family Food the other night, I determined slowly to roast a chicken, turn the oven off at bedtime and then retrieve a perfect fowl in the morning.
Unfortunately I forgot and left it on, so I woke to a house pervaded by a perfectly foul acrid smell and a carbonised chicken.
Seeking freshness I tried Abbey Mills' Luminscents (whence previously I had not ventured) and was recommended may chang oil.
Apparently you can vapourise it by dropping a little onto the bottom of a warmed oven or by spreading a drip on a light bulb, but I bought a pillar oil burner.
I tried it out last night and it worked a treat.