You guys could add a ashtray next to a house or on a porch in the fure with cigarette butts in it and it could have ashes (grey dye) bee repellent (the nicotine smoke) it could secrete the tar also and it could be a binding agent on spike traps to make them slow enemies down and make then drowsy 

Edited August 18, 20205 yr by HeDoBeDoin
Didn’t proof read

interesting.  filter could have lots of uses also,  like a tier 2 option over gnat and mite fuzz, bedding (if you could stand the smell) with grub hides to make a mattress.  Twigs and ant parts to make a bed frame.  that could give you bonuses for health and stamina vs. sleeping in the shelter.