Best way to cleanse a toilet?

Ok, so last night I was mentally assaulted by a pair of Siamese Gorilla Twins who possessed psychic powers. Being one of Chthulu's chosen ones, I was able to resist enough to hold on to my sanity, but I was unable to drive them away, and now they have possessed my toilet. What would be the best brand of cleaning supplies to cleanse my toilet of these demonic gorillas?