I don’t know how many times I have used the sentence “did you wash your hands” nor how many times I have heard the refrain “yeah yeah”. Did you use soap? “yeah yeah”. The ultimate test is typically “ok, let me smell your hands”. Usually, sometimes there is a tiny explosion, “grrr, ok” or perhaps a small grumble and run back to the bathroom.
On their return they always force their little soap cleaned hands under my nose.