I used to fight with my bailout bottle hose for years until a guy in Corpus Christi showed me a simple trick.
For the longest time, I'd just clip the bailout bottle to my harness and let the hose flop around. It would always get caught on something, usually the guide line or a piece of rigging. I'd spend half the job untangling it. Then, about six months ago on a dock inspection job, I was working with this older diver from Texas. He saw me messing with it and just said, 'Loop it once around the bottle valve before you clip it.' I tried it. You make a single, loose coil around the valve stem, then clip the second stage to your chest D-ring. The hose stays put, has just enough slack to reach your mouth, and never snags. It's such a small thing, but it changed my whole setup. I haven't had a single tangle since. Does anyone else have a little trick like that for keeping their gear clean?