On my first deployment, someone took a massive shit in one of the toilets and covered it with an entire roll of toilet paper and it stayed like that for days. Then, someone shit on top of that first layer and covered it with another huge wad of toilet paper. About two weeks later someone added another layer of shit and toilet paper, effectively creating a “shit lasagna.” Eventually it all disappeared, I’m not sure how but I just know one day it was gone and the madness was finally over.