For most of us, the process of keeping food fresh in the fridge usually involves plastic bags, plastic wrap and/or a sealable plastic container. That's actually a bad idea when it comes to mushrooms. Photo by Sarah Laval.
Sheel Prakash at The Kitchn explains that enclosed environments like that are actually too moist for mushrooms. If you store them in there, your mushrooms will get soft and mouldy a lot more quickly. Instead, Prakash suggests you store them in an open paper bag in the main compartment of the fridge. This will allow for some much needed air circulation and the bag itself will absorb any excess moisture.