White Substance on Small Screen Next to Water Fill

brirene wrote:
With all due respect, if I'm going to worry about what my tank is exposed to through that tiny opening covered by a screen, I might just as well stay home. Much better chance of coming into contact with all kinds of nasty bacteria just walking around the campground.

Now right there is the reason that we have such ignorant designs. You just were informed that someone had a white substance in that vent, and it was likely mold. Well at least you won't need cream for your coffee.