Personally, I have found that the dirt from the sensor although replaced, however, with some
Dust particles found again at the starting point of wiping.
But that does hardly anything!
Use a blower to these are quite easy to remove and clean the sensor is like the first day.
And, not afraid of scaremongering in various forums. You can quietly go sometimes with a little more pressure over it. The sensor does nothing. Only after a beach or desert vacation I would first take the precaution blowouts and then clean off liquid until SensorWand ;-)
