My son has the hippo from Walmart that has the star light on it's back and plays nature sounds tells stories and plays…

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.