Traktor S2 Recalibration question

Hi all. I have just recently dusted off my old S2 V3 Traktor Kontrol and using it again. I thought i would recalibrate the faders and jog wheels etc..just to realign any old bugs...when i go to recalibrate it asks me to tap the jog wheel at 12 oclock 3, 6 and 9oclock before pushing ok....my question is this: Do i need to keep my finger in those positions whilst hitting the ok' switch...or do i tap the wheel let go and then push ok'...simple question but not sure which way round to do it...thanks anyway..Kol