Frozen thawed is a bit tricky. I usually use pre killed rats for my big reticulated pythons and this week I tried frozen thawed for the first time. At one point I had too many adult rats and put some in the freezer, so now I can use them. I thawed out a couple at 90F in the incubator, they were both nice and warm (90F). I dropped them in the tubs and my snakes didn't even hardly notice them at first, they finally sniffed them out (slowly) and finally both ate them. But usually they grab them and go crazy. I'm pretty sure it has to do with the temperature of the rodent. Apparently the body temp of a live rodent is 99F. So even being 10 degrees off it made a huge difference. If you are heating with a blow dryer it could actually get the rodent too hot, if the snake coils around something that's too hot and overheats the snake for a few seconds I'm guessing it may make the snake go off of food. I'd get an IR temp gun and make sure it's close to 100F before feeding, at least within a couple degrees. You may want to set up an incubator at that temp and put them in there at the end of the thawing process.

Personally I'd go back to mice and go back and forth for a bit. All of my snakes will take either mice or rats. When feeding fresh kill some prefer mice, but feeding live they all will go for either one.