I have tried to recycle the E-plates many times and I can tell you that the result it's not good. We used to rinse the plates with etanol 70% over-night and the following day give several washes with mqH2O and then let them dry in the hood. I have always have problems with the xCELLigence reading some of the wells of the plate, if not the whole plate. Those plates are not designed to last a long time sadly...