daisy_knotwise just ran out to Oberweis to pick up milk. Mere moments after she left, I discovered that Katie had gotten hold of a bottle of spray cleaner which she had sprayed all over parts of the dining room, including my work laptop. When I caught her, I shouted "Katie!"
She ran upstairs where I caught up with her, swatted her bottom, and put her in her bedroom for a timeout.
I've now cleaned up the mess. In a minute or two, I'll go let her loose.