HELP!!

Hi everyone! New to FC!

I am probably at a beginning intermediate experience level reptile person. I have geckos, a beardie, ball pythons, Kenyans, a rosy,frogs and more recently....a juvie Columbian Rainbow and Brazilian (Zero and Carmen, respectively..). I am trying to keep humidity levels up on these two and believe their temps to be correct.
The Brazilian isn't eating or striking at all (I tube feed neonates with soft red rubber caths with Hills A/D-pedialyte solution to make the formula and have researched this...have 3 Petco adoptions: two Kenyans and a baby Children's python..doing well, due to my nursing experience!)...so I have tube fed the Brazilian. I hope to get her to start striking/feeding the f/t pinks/small fuzzies soon because she has eaten f/t before. No interest yet....
My Columbian is a little older and used to strike and eat f/t just fine. It's been a month though.....that he strikes and does not grasp the food, so he just backs off. I have tried feeding outside his cage in a box, in his cage (he likes to be in his hide), prefers morning (or he did before). Right now I have him in a paper bag in his enclosure. Struck 4 times, and seems very hungry. He can't seem to grasp the small fuzzie!!!! EEEEEEEK!
*BTW I have an aversion to feeding live, and cannot/won't do it. I will tube feed before I do that (Easy for me). Both these guys have eaten frozen before. Any suggestions?? The Columbian strikes...and misses every time now. Getting frustrated!!!