Wipers acting up

[humplok]

Well. ive checked the fuses, and cleaned the outside windshield part of the sensor with windex and im still having problems.

When the wiper is in the OFF position, it will still wipe once when i turn on the car, or when water hits the sensor..

Also when I touch or knock the actual black square moduel under the rearview miror the wiper goes ape shit wiping, while still in the off position...

Im wondering how i can take off this black box on the backside of the rear view mirror.. mabye I can clean the sensor or position it properly.


Also. how much would this sensor cost? would i simply change it myself or does the whole windshield need to be replaced?

Any tips or info would be great, thanks