Wooden chopping boards are popular because their natural oils help prevent that harbouring of bacteria. However, overtime your chopping board can become scratched, and the natural oils will strip away with washing.
You can renew your old chopping board with this method:
1. Scrub your board with a scourer and hot water.
2. Once dry, sand down the board, using a fine grain if the board is only slightly damaged, and a course grain if the damage is bad. You should sand with the grain, not against it.
3. Once you cannot see any more scratches, use a very fine sandpaper to smooth the surface.