The number of hot pixels is minimized by using a delta-superdark frame in the HDF pipeline; however several hundred remain in each frame after pipeline processing. ... The masks for each day were logically OR'ed together and OR'ed with the static mask (the list of constant WFPC bad pixels) and the delta-superdark data quality file (the list of pixels that became hot in between the superdark and the delta-superdark). This procedure still left about a dozen hot pixels per chip. ...