Are you feeding in a worm bed or just worms you purchased with which to fish?
Feed the bed maybe once a week with about 1/2 cup of meal for a 4'X4"X1' bed.
For store bought worms in a worm box don't feed them at all. Just check the moisture once a day to keep it from drying out and don't get it too wet or you will have worm-goo not worms.