My intermittant wiper setting is doing it’s own random cycling. Sometimes two sweeps, sometimes eight, sometimes it doesn’t work at all. Sometimes the rear wiper actuates, even though I’ve only set the stalk to intermittant. With 103k in the NE US it’s been used a lot. Is there anything else in the circuit that could cause the problem other tha the stalk? Can it be cleaned and reinstalled or should it just be replaced? Is it a repair shop procedure or can I do it myself? If so, how?