Yes, my son's was off the charts as well. The only thing I could come up with is that my make-up has bismuth in it. I wore it while I was pregnant with Noah and I continued until about 2-weeks ago. That is when I realized it was in my make-up. I think maybe it is absorbed through the skin. Noah is always climbing on me and puts his face on my face when I hold him while he is watching videos or playing the computer. I hope this may help. Let me know what you come up with.
Laura