Illustration of the point-by-point cleaning process described in the text. Lower left panel: CMD for field F10A. This field has little to no trace of a clear RGB population, and we adopt it to be the control field for the remaining target fields. Upper panels: CMD for field F5W before (left) and after (right) cleaning. All CMDs are dereddened. Most of the stars above the TRGB have been removed, as have a number of other stars along and around the RGB.