This may be a silly question, but in order to position my BMP Connect sleeve correctly, the help text says “ lace your arm on a table and keep it level with your heart” and “make sure the Withings logo is aligned with your heart”. While I can take an educated guess where my heart is, I have no idea how to know exactly where it is, and can impossibly align the little logo with my heart. Would you be able to come up with a better description on how to position arm and sleeve correctly? I just measured my blood pressure and my diastolic value varied 12 mmHc, which is quite considerable. Sleeve itself sits nice and tight, so I wonder whether I vertically position it correctly?