Re: How do I stop this?
My son, who is now 2, still does this occasionally. The only positive response I got from him was when I ignored him or told him to go puke in the garbage can. He lifted the lid, turned and said, "Ewe, no mom." And went about playing. I just ignore him and clean it up. It's made him do it a lot less. If he gets any type of reaction, he's going to keep doing it.
I don't know how old Austin is, but, maybe walk away from him when he's doing it and only respond to him when he stops. Good luck, I know this is the less than glorious side of motherhood!!! Makes ya wonder why some of us have more than one, doesn't it!!! LOL Good luck, keep the dishpan and soapy water handy.
If you don't experience anything bad, you'll never appreciate the good when it comes around!!!