I found that putting silica bags in the dryer.. just dries out those silica bags.. It's a dryer. There's no reason why it would absorb any moisture. When then dryer cools, any moisture in the now wet dryer would go back into the filament and silica bags. It's a closed unit.. So i designed a method to remove the excess moisture from the dryer before it returns to the filament. I just run it for a few seconds during drying (maybe a minute) and the moisture disappears. I found that a bag of silica in the housing is good for one session or one day. A used bag doesn't remove any moisture. Put a new bag in the housing and put the used one in the dryer with the filament. Running the fan only while there's a build up of moisture on the insides of the dryer.