He would be sitting and supervised from now on while in my bathroom. He doesn't like it too bad. When my son went to kindergarten they had a must sit rule for that reason as there was no one to clean up the sprays and misses. They get distracted. Also they don't tend to hold onto it correctly to keep it down and actually end up causing the spray although not always intentionally. It sounds like it is an only at daycare thing and he may be doing to try and get kicked out so he can go back to where he was. You didn't say how long you have had him or the circumstances for leaving the other place.

I like the idea of allowing your son to use a different bathroom if possible so he is innocent and dcb can't pin the blame on him. Also the not allowed in the bathroom without asking to go. is the few dollars for afterschool worth the extra sanitizing - probably not.