who ever said you did? like i said, i've never used the lighting equipment, and like i said it's for cannabis. i've grown mushrooms plenty of times, and a pressure cooker may very well help eliminate contams, but with good clean procedures it's virtually a nonissue. i've had only very minimal issues with contamination, and i've never used a pressure cooker successfully in my life.
The potency doesnt vary at all. They just weigh more fresh because they are like 70% water. Dry them and the water goes away, potency stays the same. I eat them fresh sometimes.