What is the "correct" method of cleaning mushrooms prior to cooking? I have always washed them thoroughly, but I remember seeing on MasterChef a while back that the chefs were told only to wipe them and never wash them (something to do with water absorption). I've also known people who actually peeled them rather than wipe or wash them.
Don't get me wrong, I'm not losing sleep over this, but I would love to know whether wiping or washing is best, and why.