Welcome, Jenny. Yes. About 1/3 vinegar. There are no wooden parts, which would be an issue with some other vintage models. Because of its age, I’d start by just soaking it for an hour, taking it out a few times to blow though it while depressing the keys and also while depressing the moisture release. If the bad odor persists, try taking it apart and sprinkling baking soda over the insides while wet, letting it sit for an hour or more and then rinsing thoroughly. It’s usually not hard to get rid of the odor.