My son is almost 4yrs old. I have been having difficulty potty training him I have tried everything. I have been consistent, tried reward charts, gifts, and even forced him to go to the loo. Nothing seems to work. I don't know what I'm doing wrong. He hates wearing undies and hates going to the loo/potty. When I try training him and make it fun, he screams and cries as if I'm torturing him. People put pressure on me, as to why he's still in nappies. Pls can someone offer some advice/their own experiences. Will greatly appreciate it.