Advice needed. Bosch oven mistake

Wife cooked last week before thanksgiving and decided to put the oven on self clean mode. Problem is, she forgot to remove the little silicone oven rack guards. They completely vaporized and formed a fine white dust which covered the entire oven. Looked like someone threw a bunch of baking soda in there. We cleaned it throughly with dawn soapy water and then vinegar. Still has a white look to the metal. My question is, has anyone ever done this before and if so, is it possible to keep using the oven or should I replace it? Or at least replace the fan? My concern is putting food in there and some of the silicone particulate from the fan getting into food. Just more worried about safety than aesthetics.