I'm experimenting with different materials, steel scourers/scrubbers put me off due to the taste (what is it i'm tasting? oxides?), but they work rather well, a lot of people use copper scrubbers, but i can't get these.

Just randomly i thought to use stranded copper wire, i stripped a screened wire, separated the (untinned) copper strands, rolled them up into a ball and jammed them down my smoking device, a very tight fit, but plenty of air flow, i expect even less dripping than with the scrubbers.