Hi mummy, pump every 2 - 3 hours a day for 20 - 30 minutes, power pump once a day. As fpr my case, I will feel full on my breast so i power pump 1 hour (pump 20 mins, rest 10 mins, pump 10 mins, rest 10 mins, pump 10 mins) to clear the milk. If you have milk leaking, you can consider getting breast shield to collect your leak milk..