If you buy a ball vape to accompany your bong like a MiniNail or a ruby twist the bong gets dirtier way slower, like I can smoke an q over a few days replace the water a few times and there’s 0 ash or black stuff on the bong, you only get floaty tiny tiny pieces of vaped bud and that pass your screen and a tiny bit of stickiness from the thc, but unlike combustion smoke the mess literally melts away with iso or even boiling water will get most of it if your in a pinch. Also gets you higher