He was responding to comment above his that didn't seem to know that AP (including NOA) turns on auto wipers every time even if it was disabled.
As for the dry wipes, the auto wipers activate when it thinks the front cameras are not clear. User fixable things that might cause it is dirty or coated glass (sometimes inside housing, some people have taken it off to clean), condensation inside the housing (use defrost to clear). Things unfixable for user are false detections (like certain light patterns that look like rain, sometimes this is repeatable if you drive past the same exact scene in the same time of day and weather).
Thing to keep in mind is that it is all based on the camera unit. So sometimes if spray hits the bottom windshield but not the unit, it won't activate. Sometimes spray hits the unit, but not the bottom windshield and it'll activate even if your view is clear.