mike.trainer_LA said:

There is a difference between no evidence and evidence of no effect, and this subject is one where the two get swapped freely in both directions.

Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. The objection nobody has made: this only works if the measurement is doing what we assume it is doing, and that assumption has not been tested here.

One concrete data point for the thread. Say what you would expect to see if you were wrong, before you look. It is a small discipline and it changes what you notice.

Dr.RaviCardio said:

The objection nobody has made: this only works if the measurement is doing what we assume it is doing, and that assumption has not been tested here.

Coming at Dr.RaviCardio’s question from a different direction. Most of what circulates confidently in this community traces back to one summary of one study, and the qualifier was dropped somewhere in the third retelling.

Happy to go further on any of that.

One thing that is still open after wei_SG’s answer:

How long did you give it before you decided it was working?

OP back with an update, since a thread like this is useless without one.

Update: the thing I was blaming turned out not to be the cause. Leaving the original post as written rather than editing it, so the mistake stays visible for whoever searches this next.