Sorry you're having feeding uissues...urgh, it's hard! I LOVE those feeders...I put peeled apple chunks, pears, avocado, sweet potato and some others in there (not small, ball foods like peas or grapes). Reina LOVES to eat from them, as did both my boys. I wash by hand and hang to dry.
Just wanted to offer hope for feedings: my DS2 went thru a LONG rough patch with not eating, and it took a lot of patience and persistence, but eventually got into a groove. My boys never ate past stage 2 baby foods, though. Once they had more teeth, it was real food all the way (never sued like, Gerber Graduates). GL to you!