Meanwhile, electrowetting on dielectric (EWOD) and optoelectrowetting (OEW) are well-known phenomena and techniques, e.g., used to actuate microdroplets in digital microfluidics (DMF = lab on a chip 2.0). OEW has the advantage that the electrodes do not have to be structured, which makes design and technology of the device simpler. But one more layer is necessary for OEW and it is harder than with pure EWOD to find the best operating point. As early as 2008 Krogmann et al. pointed out that - depending on exact parameters - OEW can be exploited either to pull or to push droplets. Until now the understanding has been that pull-actuation should be observed at small frequencies of the applied voltage, while push-actuation should be measured at larger frequencies of ≈ 1 kHz or above for typical parameter sets. In the laboratory for some devices, we find push-actuation for a very small frequency of 50 Hz and thus – in this mainly numerical investigation – revisit and modify the equations commonly used for the description of OEW.