Well I do rince my worms off then soak them for a minute in treated water (makes the worm wiggle and squirm). I then dry them with a paper towel then dust accordingly. Be aware that vitamin dust will make the worm turn all gooey. So try and minimized the time between the dusting process and feeding. For vitamin dust I take a pinch and spinkle it over the worm. Calcium d3 I just dip the worm in a little baggy to just get a small portion of the worm covered because calcium dust coats worms really thick. I cover about 10 to 15 percent of the worm with any dust. Maybe a lll ittle less with vitamin dust. Make sure you get nightcralwers and not redworms. Redworms secrete a nasty tasting slime as a defence mechanism and look like smaller nightcrawlers. Poor Mojo got slimed once. He kept wiping his mouth in disgust. Always inspect your worms for bumps and any impurities. You can also cut your worm from the buttand feed from that end, the head portion will just heal up.