You should always keep the surfaces you are using clean. You need to wipe down the bench, and the table, and to wash the dishes that you use.

You must wash any boards you use to cut foods.

Make sure you wash them in hot water.

Check that the cloth you are wiping down with is clean, too. If you use it for too long, it will get dirty and full of germs.

Then it will be spreading germs, not cleaning them up!