Being slightly more careful doesn't really help in this situation. They are slightly more careful. The smart ones are very careful. It's intrinsically dangerous. Someone suggested a tag out system and that just makes it clear to me they don't understand the mechanics at hand. Why more of them don't wear a harness, tie off, and the buddy system, I don't know, but that's about the only real way you can recover if you get sucked in.
Being slightly more careful just is using the harness, etc. they don’t do it because it takes time and they’ve done this before and it’ll be fine this time.
It also takes 2 guys and a complete halt of the process. If you could just drop something in there that would do the job, that may actually save money over the long run. Especially if you could keep dispensing while it's working.