Hi my name is XXXXX XXXXX can help you with your issue.
It won't harm the oven, it should be wiped clean with plain water to get rid of all the cleaner
It could be toxic if breathed in or digested in large quantities
It's more of an irritant
The oven has a white residue so I am assuming that is the dried cleaner. Thank you.
If it's used properly it shouldn't cause any problem, I would turn the oven on to it's highest setting and let it burn off with all the windows open if there is a lot of residue left on the inside of the oven
Yes that is probably what it is, try and clean it off as best as you can with just plain hot water and then run the oven to burn it off