feeding f/t

What can you do to get your snake back on f/t what if they stop eating f/t and started to eat live how can you get them back on frozen thawed

All the snakes I have we're live feeders until I got them. What I do is take out the rodents I need for feeding day, put then in my reptile room on feeding day right infront of the fan. As they start to defrost the scent of the rats is all over the room, then around 7 pm blast the rats with a hair dryer so they are around 100 degrees body, and 110 degrees head. Then open tubs and feed, at this point everyone is at the front of their tubs/cages waiting to get fed.
Warning** make sure cages are clean before you start defrosting the rats, because they smell rats and you go into their tubs/cages they will probably will think your hand is a rat.