My daughter is almost 4 ahd regularly wets herself. She doesn't do the whole wee in her pants, but starts it and is damp enough for her to need a change of pants. She's been toilet trained since she was 2 and a half but has always had phases where she's regressed. She seems to find going to the toilet a total inconvenience. I've tried everything! Star charts, rewarding her with a chocolate, getting angry, ignoring it and not saying anything! She goes to nursery two days a week and she often has accidents there too, I think she just puts it off as long as she can because she can't be bothered to go.