I have a preemie in the hospital now but had to go back to work. I was pumping at home and have a good supply that I would like to keep up. How do I continue to pump at work and deal with sterilization. I can sterilize the milk collection bottles at home and that's ok, my dilemma is with the rest of the pumping system that I can't sterilize after one use. Is it safe to just wash and reuse a few hours later? My baby has recurrent NEC and I'm afraid that his intestinal tract is now very sensitive.