Not all mushrooms behave the same way in the kitchen. Some have a dry, fairly closed surface and only need a quick wipe, while others hold grit in folds, gills, or crevices and need more than a pass with a damp cloth. The big reason to care is simple: too much water changes how mushrooms cook. Instead of browning, they steam; instead of staying meaty, they can turn limp.
For everyday cultivated mushrooms like champignons, the safest rule is gentle cleaning, not soaking. If they are only lightly dirty, brush off debris or wipe them with a barely damp paper towel. If there is visible soil on the cap, a very quick rinse is fine, but dry them immediately and thoroughly. What you do not want is to leave them wet on the counter or in a bowl, because that extra moisture lingers on the surface and slows browning in the pan.
Champignons: wipe first, rinse only if needed
Button mushrooms and cremini mushrooms usually have the least trouble with a quick clean. Their caps are smooth, so dirt sits on the outside rather than hiding deep inside. Trim the stem ends if they look dry or dirty, wipe away any grit, and slice them only after cleaning. If you wash them, spread them out on a towel and let them dry before cooking. That small step makes a noticeable difference when you want golden edges instead of pale, watery mushrooms.
Oyster mushrooms need a little more care
Oyster mushrooms are more delicate in texture, and their layered shape can trap bits of substrate or dirt between the frills. A dry wipe often works for a clean cluster, but if you see debris tucked into the folds, separate the pieces and clean them carefully. Because they are thin and tender, they also lose their best texture quickly if they sit in water. Clean them right before cooking, pat them dry, and get them into the pan without delay.
Wild mushrooms usually need proper cleaning
Forest mushrooms are a different story. They often come home with soil, pine needles, sand, or tiny insects hidden in the cap edges and stems. A mere wipe is rarely enough. For many wild mushrooms, a brief rinse, brushing, or careful trimming is the practical choice, depending on the species and how dirty they are. The goal is to remove grit without leaving them soaked. If they are heavily muddy, clean them in stages, changing the water or cloth as needed, then dry them well before cooking.
As a rule, mushrooms that are dense and smooth can usually be handled with minimal moisture, while mushrooms with folds, layers, or stubborn dirt need a more thorough clean. The key is not whether water ever touches them; it is how long they stay wet. Mushrooms absorb and hold surface moisture surprisingly well, and that moisture is what gets in the way of good browning.
If you want better flavor and texture, clean mushrooms at the last minute, use the least water that gets the job done, and always finish by drying them thoroughly. That way champignons stay firm, oyster mushrooms keep their tenderness, and wild mushrooms cook cleanly instead of releasing a puddle into the skillet.
Try it with this recipe: https://en.alwaysyummy.recipes/crispy-puff-pastry-vol-au-vents-with-creamy-chicken-and-mushrooms/