I use a diluted vinegar solution for household cleaning. Very roughly 1/3 of store-bought vinegar and the rest water, For notebook and cell-phone screens, I soak and wring out a microfiber cloth towel (nothing fancy, the kind sold for use in cleaning cars), and spritz it with this vinegar solution. Wipe once or twice, form a point and get the edge, very light pressure, and then turn over the cloth, final wipe. The water evaporates in a few seconds, no need to blow on it.