While making breakfast this morning I thought the temp was reading screwy. I switched therms (I don't clip mine in) and got a different reading. I then used my Thermapen and it seemed like the dials were off. So I calibrated them with boiling water, and by that method they are dead on. The also seem to agree when switching them out on the hot dome.
My question is where do yours sit when cold. Two of mine sit off the scale below 50, but one is well up on the scale even though it is cold (although not at a temp I could actually hold). It does seem to read accurately when hot.
XLBGE X 2, LBGE (gave this one to my daughter), MBGE and lots of toys