WD40 and a toothbrush. Wipe with paper towels.
I agree with William. The only thing I do differently is to use a rag first then the corners with the tooth brush. WD40 is an amazing product that works for a lot of things around your home. Wishing you the best.
OXO Good Grips Deep Clean Brush Set, Orange
These are stiffer than toothbrushes. $6 for 2 on Amazon and they are angled so you don't scrape your knuckles
Vacuum first. Wipe with wet paper towel or microfiber cloth. Get into crevices with wet Q-Tips. Dry completely.