Learning: Preschooler, Bath Toys

Help with Cleaning of Bath Toys

My 3+ year old daughter goes through phases in bath toys. She hasn't played with many of her ducks and other animals in a long time. Just recently she's brought them into the bathtub, but they are filled with smelly, moldy dirt. Any suggestions for cleaning? I have used bleach in the past. How about the dish washer, top rack? Thanks.