True. Still, wouldn't you think that a soap and water soak after use would keep the counts down and reduce the likelihood of this?
Oh, yeah, I would certainly hope that those dive ops that rent suits would do SOMETHING between customers... but then again, maybe most people just assume that, and it's not really done. Yuk!
Perhaps customers should be warned to do some sort of pre-soak after renting but before using. Not sure what would be the best for that? I use Steramine to sterilize my rebreather loop at intervals. Food grade (used in restaurants on pots and pans), and easy to mix up a dilute solution. Might be better than soap.
Sounds like a good research study, actually. Pretty easy to do, we would just need a few squares of neoprene and some culture material.