Ernie devises a new system.
As is often the case, there's a really simple solution to this problem: Put Rubber Duckie on top.
It was very nice of Bert to acknowledge that it's the thought that counts. And his comedic takes are wonderful: "You're actually cleaning up? Be still, my beating heart!"
There's that inflatable ring thing again. Did he say what it's called? It sounded like maybe he called it something right at the end of the sketch, but I couldn't understand what he said over the music.