Hi Yohopi:
I just ordered my Medela PIS, too. I'm excited about receiving it. Yohopi, since I noticed that they do sell used ones on EBay (I purchased a new one on EBay), might I recommend that you carefully open the box and keep it? I'm going to try to keep everything in tact. That way when we are done with it, we can sell it easily on EBay, as well.
Waiting to hear how others clean it. I've heard of sterilization units from Nona. They are on EBay, too.
Thanks,