Pre wash before use

Kortney 💚 • 7 year old daughter and baby boy born April 2018 💜💙

I have a bunch of brand new AIO pockets and inserts I need to wash. What kind of detergent Can I use? I normally use arm & hammer with oxi for my normal clothes. And how do I wash them? Cold? Hot? Do I wash the inserts with the covers? Do I wash them more than once? Most of my diapers are ALVA BABY if that helps. 😊

I’ve read online about this, but every site is different, which makes it confusing!