Ok thanks again for all the support. I've got an other question thou. I'm trying to dry some shrooms i picked. First day in open air, but after that i found some articles about boxes and perlite, so i but them in my pressure cooker on top of a layer of perlite. This morning (a day in the cooker) i found them covered with a blue grayish darkening on the stems (see pictures). Can anyone tell me if I should worry about this?