I use a screen collander and rinse them off under warmish water. I don't keep them in the sawdust stuff either. I dump the container into the collander, rinse them off and put them into a smaller critter keeper then put either baby food fruit/veggies or over ripe fruit/veggies on top of them. They eat and eat and get really big and fat! About an inch long and 1/4 inch wide! When I feed them to my cham I scoop them out with a slotted spoon, dump them into the screen collander again, rinse them under really warm water, dump them on paper towels to dry them off and then dump them into a shallow dish to feed the boys. It sounds time consuming but it really isn't. Once I dump them in the critter keeper I don't do anything with them until I need to feed them off. I buy them on ebay from the seller rainbowmealworms. I get 300 for about $21. They ship fast and the worms are very healthy and active.