Hello, I am about to move in a new apartment which was not rented for about a year or so and the person who stayed before doesn't seem to have been very clean and tidy. Moreover, the hot-plates are full of rust because of the moisture. Do you think I should buy a new oven or is it ok if I find a way to clean them? Any cleaning tips would be helpful, as I am quite inexperienced (esp. toilet, kitchen). Thank you.