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					Originally Posted by shilala   If the HCM beads ever get grossed up for some reason they can be steam cleaned or boiled back to newness. | 
	
 Can you do that with silica beads or just HCM?  If not, what's special about HCM that allows them to be cleaned up?
I deal with carbon filters at work and we're usually looking at SO2 as the primary environmental contaminant.  Let's assume for a minute that my humidor is sitting in a similar atmosphere, would either the silica or HCM adsorb the SO2?  May not be applicable to a home humidor, but I'm curious 
