Headburn Shampoo is one of Humphrey's "inventive" products produced by Vykkers Labs. It's mentioned in the cutscene where Munch befriends the fuzzles and has sonar placed in his head. Headburn Shampoo was originally meant to be a conditioner. Humphrey claims that it "tested fine on the Fuzzles". In reality it burned holes in customers' heads. The name was then officially changed to Headburn Shampoo.