[toobam3]

I bought a 16" tube with a diffuser, perc, and ashcatcher. I try to clean it like once every 4 days. This is the weird part, since I've bought the tube several glass bumps have appeared on it in random places they are small, maybe the size of a caper, if that. Im puzzled when it comes to it, I dont understand how they can just appear?
Anyone?
??