Extraact from The Sunday Times on 22nd Mar 09.
Q : After baking, what is the best way to remove the smell from the oven so that it does not carry over to the next item?
A : First, clean your oven as thoroughly as you can, scrubbing off the baked on stains or spots from which off-smells can emanate. Next, cut an orange and a lemon into thin slices and place them in a wide cake pan or roasting dish.
Place the cake pan on the middle oven shelf, then fill it iwth boiling water. Shut the door, turn the oven to 180 deg C, and leave it for 20 to 30 mins. Switch off the oven and let it cool down a little, with the door closed.
Remove the pan and shelf. Soak a clean cloth in hot water and wring out, then give the oven a final wipe. The citrusy steam should have displaced any lingering smells.