I also thaw out my feeder in the room belly up (on the top of the enclosure even) using around a 2 hr thawing then checking for a soft belly then quick heating up time. I find doing that is a great tool for making the snake hungry. How would you like sitting in front of a restaurant hungry for 2 hrs, wouldn't it make one even more hungry. My snake knows now when she is getting fed and has her head out the hide door most the time and makes a quick grab.
But when fellow posters say we shouldn't thaw out in air but only use water because of bacteria build up then the same say to leave the feeder in all night it makes me shake my head wondering why they would turn down and advise against a good feeding tool and then say to leave it out all night is ok. Bogertophis is very vocal about air thawing but all night is alright I guess to her. But she isn't the only one. I figure to each his own but I want people to know I believe that thawing in air carefully timed is a great tool or method. I will continue to do it because A. I don't think it harms the snake or causes turn downs at all in fact it is the opposite and B. the ones who say 2 hr air thaw is bad give WORSE advice and say all night is ok.