We have a 2.6 yr old, we have been potty training for about two months - it has been going really well with weeing in the potty. He seems more than capable of saying when he needs to go, and waiting until he gets to the potty. But in the last week or so he seems to have lost interest, he seems happy to wet himself, actually seems to find it funny, and doesn't seem bothered about having wet trousers. Has anyone else experienced this? Any advice welcome...