your humidity is way too low; aim for 60%.
temps also seem on the low end all around.
regarding your questions: my shyest eater has absolutely gotten "embarrased" after a missed strike and gave up. he doesn't miss often but this scenario has happened to us before.
regarding regular missed strikes: are you heating the feeder properly? focus the heat on the head more than the body?
EDIT: your noodle looks stunning btw!