Just give them a little time. As long as what was offered is not too big for them to get down they will get it eventually. Rarely is the food item too big. Often its too small. Let us know how it goes.

A quick note on what you said about removing the eyecaps more than once now. How did you remove them? Raise the humidity when they are in shed or use some bacitracin on the eyes during a shed cycle if you think they have stuck eyecaps. Playing with them dangerous. You dont want to accidentally remove the protective cap which is supposed to be there under the outer eyecap.