Potty training

Amy • Mom to 4 beautiful girls. 3/3/10, 4/27/14, 4/8/17, 3/7/19.
Anyone have good advice for those stubborn potty trainers. My two year old hates to sit on the potty and I'm sick of buying diapers. She's getting better on pee, but poo is a completely different story. My first born was already potty trained by the time she was her age. /: