An open chamber on a Hitachi 712 Etcher, about to be cleaned.Yes, that's me hiding behind the mask, scrubbing the chamber.After we scrub the chamber, we have to wipe it out with wipes and water.  This was the first wipe, or the "Before" picture.This is the "After" photo.  The wipes must come out as clean as when I pulled it out of the bag.Mario is cleaning the Transfer module.A nice clean chamber, about to be reassembled.The chamber has been put back together, and checked for leaks using Helium.Equipment techs hard at work.That is not me in the photo, but he is working on one of the tools that I work on.  This is almost inside a Hitachi 511 Poly Etcher.