after every two or three use. however, there are certain situations where bath towels are not required to be washed as often. like, the bath towels you have placed in your guest bathroom is not used often so of course, it does not need washing.
another important aspect to remember about the bath towels is to never share it. we have seen many families sharing a bath towel or siblings using the same one. let us warn you, it is not at all recommended to share bath towels as it helps in the spread of germs and minor skin diseases.
anything related to food must be as clean as can be. dish 