Possibly you've managed to de-magnetize those little magnetic spots. Not sure how. Heat can de-magnetize, but it seems unlikely washing even with hot water would do this.

On my watch, I seem to have managed to de-magnetize just one of the dots. In every rotation there are 3 "clicks" which are not recognized but the others are.

Only after I found this teardown page do I now understand why.

From image 8-1 I can see that the hall effect sensors are aligned 90 degrees clock-wise to the side with the buttons as the watch faces up ... so along the "bottom" edge ... and by moving the bezel until the "middle" of the 3 clicks is at the bottom and marking it, I know which one is giving me trouble.

Now to figure out how to re-magnetize it.