Have a four year old girl who WILL NOT go in the potty. She doesn't seem to care if she is wet or dirty. Has a melt down if we want to change her or ask her to go to the potty. Have a a couple of successes of her trying... but she says it doesn't work for her! We have been very patient, but seems we should be able to encourage her some how? When around other four year old girls, she wanted to try, but it only lasted for a day. She says she can't do it!