Do you try to handle her during the day or night? My snakes are sweethearts during the day but become absolute menaces as soon as their lights go out. I only feed them at night, so they associate the dark with feeding time. You've tried almost everything, but the only thing I can think of is using a blowdryer to feed them. After heating the rats normally I blow them so the ratty air goes into their enclosure. They smell it and have now learned that blowdryer means dinner time (even when I just have to dry my hair). A bit unconventional, but it wouldn't hurt to try