I keep f/t pinkies. I place the frozen pinky in a glad lock sandwich bag and dump th tuna water from the can into the bag with the pinky. I then seal it shut and place it in a sink of hot water ( not too hot ) for about 15 minutes. Then I remove the pinky, discard the tuna water and place the pinky in a small deli cup with air holes in it. I then place the little corn in the deli cup and put the top on and place it back into the cage. The first time I tried it didn't work, but I tried again 2 weeks later and it worked well. I am now trying to see how many times I have to do this before she will take a pinky without tuna water.
As far a other snakes go..I have not had to try it with my other hatchling ( western hog ) but have heard that it works really well for them as well.
Hope evrything works out well for you!!