Kushy

With any gas/smoke/vapor substance and enough use, there will always be residue. I have a VB box vaporizer and not only is my whip coated with wandhash, the tube (what the vapor flows through) is covered with a goldish resin from the vapor. This would be the same
with anything whether you were looking at the resin coating of smoke on a pipe, or the vapor coating on a vaporizer.. With any substance there will be residues- much less so with vapor (as it's much cleaner than smoke)... If it gets built up enough I'd say sure clean it, but seeing as it's clean vapor, there isn't really a need for it

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Finally de' herbs come around