Clean Shoe

As me and the kids were driving home from working out this morning, Jayden says to me, ‘Hey Mom, I’m getting all the dirt off.’ Not having any idea what he was really talking about, I said, ‘Ok’. I can’t see him all that well, as he is sitting behind my seat now, so I’d really have to turn around backwards to get a good look at him and I decided that might be a little too dangerous, and I couldn’t think of anything that was in the car that I didn’t really want him to have. So I didn’t think much of it and went back to singing along with the radio. Then a little while later he says, ‘Mom, look! It’s all clean now.’ And I say, ‘Great! What’s all clean?’. And he says, ‘My shoe!’ I’m thinking, ‘What the???’ But I say, ‘It’s all clean? What did you use to clean it?’ To which he replies, ‘My tongue!’. And he holds up his shoe, so I can see it in the rear view mirror, and low and behold, the sole of the shoe is all shiny and clean. Fantastic. Hope he hadn’t stepped in poop or anything.

Can you tell which one he cleaned???