Why do some wooden cutting boards crack down the middle after a year while others last a decade? Mostly it comes down to how they dry, not how they are washed.

The Real Enemy Is Uneven Drying

Wood swells when it takes on water and shrinks as it dries. If one side dries faster than the other, the board warps and eventually splits along the grain. That is why the board left standing upright against a wall, or sitting flat on a wet counter, tends to be the one that cracks.

Where the Salt Comes In

A mild salt scrub does two useful things. It lifts stuck on food without soaking the wood, and it pulls a little moisture out of the surface so the board dries more evenly. You are not sterilizing anything with salt, so do not expect that. You are cleaning gently and controlling water.

1. Sprinkle coarse salt over the board.
2. Rub with half a lemon, cut side down, going with the grain.
3. Wipe with a damp cloth, then dry it standing on edge.

Oil It, but Not Too Often

Once a month is plenty for a board you use daily. Use food grade mineral oil, not olive oil. Olive oil can go rancid in the wood and you will smell it months later. Warm the board slightly first, wipe on a thin coat, let it sit overnight, then buff off the extra.

I ruined a nice maple board by leaving it flat on the counter next to the sink. It cupped within a season and then split. The replacement has lasted four years because I dry it on edge every single time.