How to prevent clogged ducts

Kris🐶🐶👶🏼
I really need some pointers here bc i am so tired of my boobs hurting. I keep getting what i assume is clogged ducts. Atleast twice a week i seem to get one. I pump and i do it frequently, like every 3-5 hours. I dont generally go over 5 hours but there have been a few occasions where i wasnt home for whatever reason. 
Help me