My son has the hippo from Walmart that has the star light on it's back and plays nature sounds tells stories and plays music and I am in desperate need to learn how to clean it! He got poop, yes poop all over it on the cloth part of it how in the world am I suppose to get it off? I would've included a picture of the hippo but didn't wanna show his with all the poop on it and I also couldn't find a picture of it on walmarts website.