Breast pump cleaning

Brittany • Mama to 2 girls! 💗 🤰🏼 with number 3!
I'm a FTM and have some questions about the breast pump parts. Hopefully someone on here can help me out .. :) 
How often should you sanitize the parts? After every use? 
I have the micro steam bags & wipes to clean parts .. Is that good enough to clean parts? 
Is hot water and soap ok for cleaning parts ? 
What do you use at work to clean parts? 
Im pretty much clueless to this whole thing. I just today washed my parts with soap and water & used the steam bag to sterilize. I figured before I have to use them I should sterilize. 
Thanks ladies :)