Grilling with Wireless Thermometers. I’m running a bunch of experiments to see how I like wireless thermometers. I don’t typically use leave-in probes when grilling steaks because they cook quickly and I’m standing right there as I cook them. But, I now have all these wireless probes, I figured I’d give it a try. First of all, probe size does matter. It has to be long enough to hit the middle, but not so long that you can’t insert it far enough. Because they have to fit all that tech into the pr