In the fall, I thought I had it all figured out but as time went on, it became clear that Nathan had not learned the lessons I wanted him to.
So we've had to go back to basics. Our behaviour therapist suggested we focus exclusively on the goal of dry pants rather than lack of accidents. She also suggested we get rid of the iPad in the bathroom, since that had linked going to the bathroom with watching videos. (That was a problem when he used the iPad or computer outside of the bathroom.)
Since he is likely to go while watching TV or playing on the computer, that's where we focused our efforts. Every five minutes, he has to stop and report on whether or not he has a clean bum. There's no punishment for an accident but he has to stop and go get cleaned up and help with putting the dirty wipes in the garbage. If he is clean, he gets a Smartie and we continue.
It's time consuming. It means I have to be right there whenever he's playing and constantly running a timer. Thus far, success has been intermittent but he is telling us right away when there's been an accident which makes cleanup easier.
I hope this will work but I expect it will be a long time before I know.