She's 5. She hates it, I hate it and two days later its looks the same as before. I think I last washed it about 6 months ago. I do bath the child once a month whether she needs it or not every few days, and she goes swimming every now and then but I am not sure that counts as she won't get in the pool showers. There must be a mild disinfectant effect of the chlorine tho??