raj_cambridge said:Practical: whatever you change, write down the date and the reason.
Filing a mild objection. Mild because I might be wrong; an objection because nobody has addressed the case that does not fit. Pushing back on the anecdote-stacking. Twenty people reporting the same thing is twenty samples from the same self-selected pool, not twenty independent confirmations.
Ask again with the specifics and you will get a better answer than this one.