Refrigeration: Yes, mushrooms should go in the fridge! Store them in a paper bag or wrap them in a paper towel and place them in a bowl. This helps absorb excess moisture and prevents them from getting slimy.
Washing: Avoid washing mushrooms before storing them. They absorb water easily, which can shorten their shelf life. Instead, clean them right before cooking.
Freezing: You can freeze mushrooms, but it's best to par-cook them.