Bins of fresh amanitas
The best way is with a fan, no heat
Cleaned, in single layers in crates/grocery baskets, {spore covered grocery baskets returned to the store are a wonderful way to help spread spores to the whole neighborhood} placed on a box fan pointing up on two saw horses. {or whatever} Stacking the crates with caps in single layers in each allows max airflow and keeps them from levitating and flying off, heavier fruits in bottom crates with lighter fruits in above crates. As they become dry they shrink and eventually can all fit together, if you wish. This process lets them remain in the most pristine condition. After they are very, very dry, if you put them in a bag or jar they will get soft and damp again in a short time unless desiccated. I use damp rid from any store that carries it. {H.D. or F.M. for 2 examples that carry it.} It comes in bags too for use with your own containers. MAKE SURE TO GET THE UNSCENTED KIND.. A coffee can for example. Simply put desiccant in the bottom of the can, an inch or two will do. Place a screen over the desiccant, or even a napkin or paper plate will work, to keep the mushrooms from being in direct contact with desiccant. Ideally you would want a screen or something in the can under the desiccant to create a reservoir for collected moisture pulled from the mushrooms, but unless you are doing a large amount of desiccating, it will work fine. Other types of mushrooms can be made cracker dry with this process. Alternatively, with small amounts, you could put the desiccant in a small container/bowl/jar/ramekin along with the mushrooms, into a container and lid put on. Smaller mushrooms or pieces can be safely contained with other repurposed materials. That pink thing is, {focus!} one of those scrubby things, washed, dried and tied, making drying bags. Place fan dried mushrooms in can and put the lid on tight. Depending on the amount and how dry to begin with. They will be cracker dry within a few hours to a few days..Once the caps are cracker dry and you put them in storage container, you still need to put a small amount of desiccant in there with them to keep them cracker dry. like the pic of the desiccant package is indicating.
It's best to dry them with as little heat, beyond room temp, as you can. But with plenty of airflow. Heat not only leaches out some of the medicine but makes them discolor and be very very fragile. Resulting in lots of crumbs in the storage jar. I usually us an upturned box fan with the crossed on top, gulls down so any worms dry up and fall out. A turbo fan like for venting a grow room is even better if you have ducting attached to it and stack the caps inside. I do use a dehydrator if it is very cold or wet or if in the garage durring those times. Mine is at 95° F. But I still don't like the way they turn out with the dehydrator. Dried with just a fan they don't change color and end up hard enough to knock on a door with.