Does the link to epistemic hygiene (sorry for using a nonstandard term) resolve this misunderstanding? The point is that knowledge about assertions leaks through, biasing intuition about facts

No, the link does not help at all. The second quoted sentence is clear, but it doesn't seem remotely like the wiki. If that is what you (and others) mean by the phrase, then you should change the wiki. One difference is that the wiki is written as if it is about specific procedures (hand-washing), while the point here is the problem (hygiene).