I have bought 2 additional probes after the first 2 failed after just a couple uses.  I thought maybe it was just my bad luck or an exceptional amount of heat from flare-ups grilling ribeyes, but now I'm seeing plenty of other accounts of the same problem.  Color coded collar either burns off completely or just corrodes, exposing the connection from the probe to the probe cable.  Temp reads the maximum, then back to a lower temp, then stays at the maximum.  Impossible to trust them after that.  So, I pitched them.  I'm down to 1 of the 4 I've purchased and I'm assuming it won't last much longer either.  The app and the device itself are great. Probes are the weakest link.