I'm using the clear blue advanced digital opks and I know the manufacturer instructions say to use them first urine after sleep but I know for myself and past opk use.. I've used strips.. I know that I catch my surge midafternoon. But I have used the CB adv digi as well in the past and I always catch my peak it's just I want to catch it at its earliest possible time so I have the most optimal chances of conceiving. When/what time of day do you think I should be testing? TIA.