I'd clean the foam in the kitchen sink by using soapy water, holding them under, and squishing them about a hundred times. Then I'd do the same in clean water, maybe twice.
The inside of the box I'd wipe out with windex soaked paper towels. Or spray it and wipe it out. I'd do that a couple times using clean towels each time.
Then I'd wait for the sponges to dry in the sun and load her back up. I bet it'll smell glorious with that outdoor-fresh and clean going on.
It's really not a big deal, it'll clean up for you real nice in no time. It might even be nice that this situation forced you to do it, just to freshen her up a bit, ya know?
Good luck!!!
