On Mon, 27 May 2019 16:36:55 +0100, Another Dave
wrote:

My wife has just been cleaning the gas cooker. It's seems to have been a
struggle and taken forever.

I seem to remember there were aerosol sprays that did the job. Have they
been legislated out of existence? Any recommendations?

One that works very well but all the warning signs on the bottle
really mean it is 880 Ammonia (Not "household Ammonia").

You need to wear suitable protective equipment when decanting it and
placing it in the oven. The copious fumes are both toxic and very
irritating. Eye protection and a proper fume rated respirator/filter
are required Gloves are also essential.

Put about half a pint in a large glass container (such as a casserole
dish) place in oven. Don't turn the oven on but simply close the oven
door and the kitchen door and leave it for 12 to 24 hours. It softens
all the grease admirably and simply needs a wipe over afterwards.

The Ammonia evaporates quickly so after a day there won't be much
smell left and the remaining liquid isn't corrosive or harmful, it can
simply be poured down the sink. Any grease in the oven, including
baked on stuff, will have softened and be fairly easy to remove.