I'm using the Avent Isis, and it's working pretty well for me since I don't pump very often. I was wondering, though, if I still need to sterilize it after each use. The directions say that I should, but I was wondering if it is necessary. My baby is almost 6 months old and healthy. Is it okay just to wash it well? I don't have a sterilizer, and it seems like a lot of my time is taken up with boiling it in distilled water! LOL TIA!