I believe they sell laundry sanitizer at the stores ?
I wouldn't use bleach or any toxic detergents hun especially if it's for a newborn. Just soak those clothes in hot water with some baking soda and lemon. That'll do its job fantastic.
I do a short cold water no soap wash. This gets out any particles or fresh stains. Then a hot cycle with a small amount of detergent and a small amount of bleach from the dispenser with a 30 min soak. Removes all smells and all stains. 🙂 Just make sure you have enough water in it to cover all items though or you can get weird discolouration. Small loads with more water are best.
Yeah that should be fine. All i did was detergent with downy then soak for 15 mins and rinse twice.