A system for cleaning a container may include: a fluid source; an arm that moves a nozzle in at least two directions; a fluid retrieval device; a separator; and a fluid mover. One method for cleaning includes securing an arm to a support positioned at least partially outside of the container; spraying a fluid onto an inner surface of the container using the nozzle; drawing the fluid and an entrained material out of the container using the fluid retrieval device; removing at least some of the entrained material from the fluid using the separator; and conveying the fluid from the separator to the nozzle using the fluid mover. The arm and/or the fluid retrieval device may be remotely installed.