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I would take the ABS sensor off the wheel, spray brake cleaner and put it back. Be nice to the sensor, once the 2 10mm bolts are off the sensor, use a screw driver to dislodge it and then pull gently off the knuckle. The repair manual details getting the axle off the knuckle before removing the sensor but I realized it is unnecessary as the sensor is far off the axle teeth to result in damage.
Stay away from cheap semi-metallic pads, the dust can get stuck to the ABS magnetic sensor.
I recommend cleaning the sensors every 60K miles and always sticking with ceramic pads to prevent metallic dust accumulation.
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