I feel you man. Our 2 older kids got toilet trained rather quickly and smoothly, but our little one gave us such a hard time toilet training. He got to a point where he could sleep overnight without accidents, knows when he needs to pee and when he needs to poop, but just would not go in the toilet, and insists on putting on a diaper to pee/poo. We eventually decided to not buy anymore diapers and told him he needed to learn to go in the toilets or go in his pants. He figured it out in within a day. I think at a certain point in their maturity, kids can just figure things out on their own, provided that the parents don't spoil them.