Crazy wipers!!

Driving to the Indy Auto show, in my '88 C-1500 that we just put the HO Camaro 5.0 in, my wipers suddenly came to life on their own. My hand was NOWHERE near the switch!! :screwy: They came on for one sweep and then stopped. Then a little later another sweep, then another soon after and finally they just stayed on! :shakehead
I had to stop and unplug the wiper motor.
I just cleaned the switches, on the wiper motor, and they now seem to be behaving.

Seems that there was some anti-freeze that got onto the contact wheel in the wiper motor. When I sprayed carb-cleaner on it, there was green coolant oozing out! Sure made em act crazy!