No idea. The scale over here changes its opinion depending on feet position, its own position, weather, your thoughts, what's on tv at that precise moment etc.
How do you even do that? Every time you ask me about bm, I have one 30 min later. X files material.
To be precise, in the last 24 days I've had only two BM. On day 18 and just now. Please, don't ask me anymore.