We all feel your pain. As others have said, it's a case of when you get a flood, not whether you'll get a flood.
What has worked for me, so far at least, is pretty simple.
I fill with tap water a container about 1 foot high, just big enough to hold the housing (for the PT-016, a 2 quart lemonade pitcher works pretty well). Dunk it for just a couple seconds, looking for a big bubble cloud. Then for about 30 seconds, and a cursory look at the housing to see if water drops are inside. Then leave it soaking for anywhere from 10 minutes to the next morning if I forget it. Dry off and inspect the housing.
I try to avoid opening the housing unless I can do this simple dunk test again. When possible, I setup the housing leisurely the night before.
This intent of this test is to catch my dumb mistakes --- improperly latched, hair across the O-ring, etc.