Cleansing is the fourth album by heavy metal band Prong. It was produced by Terry Date, whereas all of Prong's previous albums had been produced by Mark Dodson. It includes ex-Killing Joke members Paul Raven on bass guitar and John Bechdel on keyboards/programming. To promote the album, Prong embarked on the Cleansing Tour which included opening acts Clutch and Drown. They also toured with Sepultura and Pantera as an opener for their Chaos A.D. and Far Beyond Driven tours. Prong formed in 1986 by bassist Mike Kirkland and guitarist Tommy Victor, the band's sole constant member. A pioneer of the urban metal scene, Prong has influenced many notable musicians such as Korn's Jonathan Davis, Demon Hunter's Ryan Clark, and Nine Inch Nails' Trent Reznor.