There has to be some molcajete users here.
I used to just clean mine with a soft bristled brush and water followed by rice or kosher salt and a rinse but now incorporate vinegar and baking soda. As porous as those things are I should have gotten food poison but never did. Is this kind of like wood cutting boards no oxygen no bacteria?
Stone grinding stones are everywhere and used throughout prehistory in the Americas and them folks didn't have what we have today to clean things. Had they had a problem with bacteria and their grinding stones they would have had a solution.
What is the traditional method in Mexico to clean molcajetes and how do you guys do it?