The Cleanse is a 2016 American dark fantasy comedy film written and directed by Bobby Miller.

The film stars Johnny Galecki, Anna Friel, Oliver Platt, Anjelica Huston, Kyle Gallner, Kevin J. O'Connor, and Diana Bang.

Depressed and disappointed with his life after losing his job and his fiancée, Paul Berger attends a selection seminar for "Let's Get Pure", a secretive self-help program created by Ken Roberts.

He is hesitant to sign a liability waiver that mentions the possibility of death, but agrees to participate after learning that Maggie was also selected.

Paul and Maggie also learn that two other applicants, Eric and his girlfriend Laurie, were selected to join the retreat.

Because of their horrible taste, Laurie is unable to finish her fourth drink while everyone else completes the first stage of cleansing.

At the conclusion of their conversation, Ken gives Maggie a blade and instructs her to kill her creature to complete the cleanse.

While Paul drives, Maggie checks on the two creatures in the backseat and discovers them having merged into one Kafkaesque monster.

When Paul regains consciousness, he sees Maggie trying to kill the fused creature by bludgeoning it with a rock.

The critical consensus reads: "The Cleanse uses its unconventional premise as the framework for a suitably eerie and solidly well-acted horror outing with some surprising emotional heft.