Our 3 year old (with a 2 month, 5 year, and 9 year also), is struggling with potty training. He won’t go potty until it is too late, so we are constantly cleaning up potty. He does fine at his kids day out program. We homeschool, too. Mom nurses newborn on demand. He will not, but can, pull his pants up or down. We are obviously not doing a lot right! Help? Thank you!