I havent had a problem with my complement control cells, but with my new lot of panocells, screen cell 1 has started giving me 1-2+ results with O patients. When we do the ID, nothing. I called, and since I had troubleshooted to the best of my ability (ran DAT on cells, ran straight in the gel, etc.), Immucor decided to send me a new lot of cells that should be arriving at any moment. Oh and by the way, repeating the cell in tubes yields a negative test, go figure.