brown stuff in vape whip

i have the vap bros and iv had it for a few weeks, now theres a brown like crystally build up along the glass part of hte whip and slowly getting bigger and darker, wut is this and should i clean it . its not like tar but its like something else

 

resin? scrape it out. i'd say get rid of it, some would say smoke it.

 

collect it.. great to smoke when ur out of dope.. gets ya nice and baked

 

crystally? is it brown, black, or shiney?

 

the thread name says brown stuff in vape man

 

Its just resin, same as the resin that you scrape from your pipe, only much purer.