It took a long time for me to potty train my 10 year old son with ASD and it was hard. The problem is, now he is able to go and poop at the toilet by himself but I have tried to teach him to wipe himself with no progress whatsoever. He ends up dirting the whole bathroom , floor, wall with poop all over so I end up having to wipe him. How can i help him learn how to wipe himself