My youngest son (2.5) has been doing great using the potty for a while now. Initially he was very proud of himself (and still is when he uses the potty). He appears to have had a change of heart in the potty department. He purposefully pees and poops himself when he is both mad at you or just to do it in order to try and ask for a pull up. Both, the school and myself has tried everything we can think of to correct, redirect and reinforce with consistency and try to get him back on track. Everything we have tried has failed miserably. He is VERY strong willed. I have been reaching out everywhere to see if anyone ideas that maybe I have not tried.We went from only being in overnight pull-ups...to the point that he has been doing this so much that he's leaving me little choice but to have to send pull-ups with him to school again and having them on-hand at home for when he repeatedly just stops, stares at you and pees himself. We've tried rewarding, redirecting when we can see he is upset, he's had age appropriate punishments, we refrain from showing him he's "getting a rise" out of us and we're at a point that we're all drawing blanks at this point. Putting him on the potty often does not work. He knows what he is doing and will hold it sitting on the potty and reserve it for a perfectly timed stare down. I am just at a loss here. He is by far the most stubborn out of the three boys!