A few months ago, while I was away on a trip, my mother-in-law, trying
to be helpful, cleaned our grimy oven with oven cleaner. The problem
is, our oven is a self-cleaning model.
I have read that, if chemical oven cleaners are used in self-cleaning
ovens, the ovens will be damaged if a self-cleaning cycle is started.

What can I do? I have obviously tried to wipe the oven clean of the
chemical stuff, but of course, some of it will have remained somewhere -
it is a nasty powdery stuff. Can I still use the self-cleaning feature
of the oven?

This was a few months ago, as I said, and we have used the oven in the
meantime without ill effects.

I thank you for any advice!

Peter