Try mincing worms up n mixing them with pinky chunks in a shallow dish or lid with a little water. The way I do it is cut the pinky up while frozen, into bite size chunks(about the size of her head or little bigger) put it in the dish with little bit of luke warm water, then take out the worms n mince one or half of one up, like really finely chopped... mush really. Then do a few bite size pieces of worm and mix the in with the pinky mouse chunks that are already thawed by just sitting there while the worms are chopped. Then present the dish, if your snake it used to hemostats you could used them to move food around in the dish.

Doing this made it so easy to feed my little Radix, Babs. She'll eat anything I mix like that lol

On temperature note of food, I think they almost prefer it cool, seeing as their natural food (worms n frogs n slugs) are cool to the touch. Where as Boas (which you said you've owned, right?) are used hot prey. I used to thaw everything in a plastic bag in warm water but my girl didn't seem to enjoy it at all, never eating much. Now since giving her food that is on the cool side, she's a pig, she loves it!