On both old watch 4 and new watch 6, double tapping to record running segments is haphazard. Tried tapping fast, slow, lightly, firmly, tip of finger, finger pad, finger dry, finger sweaty, but nothing seems to work consistently. About 2/3rds of time it works. 1/6th time it goes off where I don't want it to go even though I try my best not to swipe my finger. 1/6th time it doesn't do anything. I end up trying to remember which intervals it took 2 to 10 sec to end a segment when entering data in a spreadsheet. Any hints on how one is supposed to double tap?