I'm giving myself a bath...in the car

Today on the way home from school Sophie removed her shoes and socks. I really didn't pay attention and then noticed she was sucking on her blankie? Still didn't say anything. After we picked up Davis I asked her why she had removed her shoes and socks. She proceeded to tell me that she had been giving herself a bath...in the car, with her blankie as the "saliva filled washcloth". She said her feet were all clean, even between her toes. She later said she needed another bath tonight to finish cleaning the rest of her body.