mix the worms in with another food...ie...pellets, shrimp, smelt...etc...
let it soak for 15 min. Then pull out the smelt pellets shrimp or whatever u used and try that... dont give in and give them the worms.. Keep trying this it will work... if they dont give after a few days then give them a little of what they like but dont stuff them.. Then continue trying the soaking. It works but sometimes takes persistence.