I have only seen smoke be an issue on equipment that was in a somkey environment over an extended period of time. I am talking about cigar/cigarette smoke in a bar that had some high end audio equipment installed. It caused some cosmetic damage, and also some more serious functional damage. But again even though I am not certain of how long the exposure was, I know the equipment was installed and used for years. Some of the functional damage would never have been discovered if the gear had not been removed and setup in a different location.
I do not think you have anything to concern unless you set the camera on the kitchen counter near the frying pan. Smoke from a frying pan can carry particles of grease with it however the greater the distance from that frying pan the lesser the chance of that happening. Ever wonder how grease gets on the walls and ceiling around a stove that has no overhead ventilation? It's in the smoke, even when you cannot see smoke!