I spray vinegar and water on both sides and wipe with a microfiber cloth.
the children always take them apart here too. One piece is missing one of the 'teeth'. lol. They have days where they take them apart, and days when they don't even realize they are there.
Currently, I still have them up against the wall in the toy room since last week when I last cleaned them. I am only going to put them back down for the babies. lol