Qusetion about oven?

I am new here and tried to type it but couldn't. this is the question:

we moved to a rental two months ago. Today we noticed that our oven has a white dust in some areas specifically on the heating element, a part of the racks and the bottom. We cleaned the oven with towel and water when we first moved in but not the heating element.

I am worried if the cleaning crew before we moved in used an oven cleaner and this is residual, we never had any chemical smells and we've used the oven several times in those 2 months. the oven doesn't have a self cleaning mode and is rather old and outdated. My husband thinks it must be residual food (like from oil) that was burned and turned to ash . I am really worried because we have two kids and hope it isn't residual oven cleaner that may have gotten into our food. Does anyone know what it may be? can residual oven cleaner survive 2 months of oven usage?

thank you
Asked Oct 19, 2017

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Answered Mar 13, 2019

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