I'm definately a fully-fledged member of the WA! First thing in the morning (after my first pee) and last thing at night (after my last pee), both in the nuddy of course! I also write down both weights.
Also, if I happen to be near the scales during the day, they just seem to shout "come and stand on me"!
Daft, really, but it reading this thread it sounds like I'm not the only one. I'm afraid I'm beyond help!