I am growing ARPE-19 cells in culture and am inducing oxidative stress and apoptosis with rotenone. I am then attempting to do live/dead staining to establish cell viability but the dead cells are easily becoming detached and being lost in washes. Will the addition of poly L lysine cause the dead cells to remain attached to the plate or does it only work on live cells? Does anyone have better suggestions than PLL? Thanks for the help!