At first sight this might not make so much sense but the best way to dehydrate your shrooms is in dehydrator at high temp for 24 hours, and it will not lose potentcy, you can find this info all over the shroomery advised and done by the professional people there, not only that it works greatly for everyone they also have a reasoning for it, i will try to summarize the info i've read bcz i am approaching this stage in my first grow a doing my research on how to do things right. I had the first pins today

The actives are degraded by two ways oxidation(which is accelerated by heat) and enzymes

But when you apply heat there will be less oxygen in the air and shrooms will dry much faster so probably less oxidation also heat above 40C will denature the enzymes making them useless

Unfortunately i don't have money to get the dehydrator now so i will fan dry for 24 hours then use a dessicant(pure silica gel=kitty litter) for another 24 hours to cracker dry my shrooms to come

Please check some posts there to feel more confident about this, they say the 2 best investments you can make in this hobby is a Pressure cooker and a dehydrator