I've been using an OXO (I think it's Pyrex) instant read thermometer,
and have been getting varied readings. The other night, I grilled
chicken breasts. The reading was 180 F, and the breasts were as juicy
and tender as any I've ever had. A few days later, I grilled chicken
breasts again, and the reading on the thermometer was 170 F, and the
breasts were almost dry and over-done. Tonight I grilled 2 whole
chickens cut up into the various pieces/parts. I checked the temp, and
it was 175 F. About 10 min later, the temp on the thermometer was about
140 F on the same pieces that had read 175 F earlier. Is this much of a
fluctuation normal, or did I get a bad thermometer, or just a cheap
"you get what you pay for?" thermometer?! Also- which takes longer to
cook-chicken breasts or thighs?

Thanks again for your expertise!

Jim