i once installed some computer gear in a butcher's shop, it was in the back room where their huge wooden cutting blocks were. at the end of the day, they washed everything, walls, floors, table tops, every nook and cranny, including under the bit where i was working. they used a soap solution with bleach if i recall. the wood butchers blocks were washed, then a thin layer was planed off the top with a carpenter's plane while it was still soaking wet and then it was washed again. this was the daily routine. the family shop had been there for a hundred years or more. apparently they were on their second set of blocks. they'd only replaced the first ones a few decades ago, so the 'new' ones were good for a few more decades.
they make good sausages.