[ztoprdlx] Clearing Dust

How do desert plants avoid concretion of dust which would prevent photosynthesis?

This is probably not how desert plants do it, but the idea is cute: Do a little bit of actual (but artificial) photosynthesis in your solar cell. Sunlight + water (from dew) + carbon dioxide creates sugar. The sugar is somehow deposited on individual dust grains covering the array, or transported and "excreted" under areas of the array which are thickly covered in dust. Next ants, or some other sugar-loving animal, do the heavy lifting: either carrying away each grain of dust with sugar adhered to it a food for the colony, or being forced to move or dislodge the dust in order to get at the sugar underneath. Thus, the solar cell is cleared of dust.