Been vaping a lot with my lil dab rig and noticed white stuff floating in it and some yellow stuff collecting in my downstem. Wasn’t worried at first but now it’s collecting at the bottom and theres a film of white stuff. Someone said might be mold (don’t think it’s mold) but I do think it’s some kind of plant matter. Any ideas? I’ve never left it to collect this long but I have noticed when vaping white stuff does tend to get into the water.