Didn't try to bleed them. The machine only has a bit over 200 hours on it. There are no leaks around the fittings on the lines from the reservoir to the master cylinder, then following to each individual brake caliper. I thought of that but didn't see a need.
I will check the sensor and connection for moisture.
It's only used around our 33 acre place. My wife keeps it clean. It's her baby. It's not used hard or in the mud. I don't know how it would get moisture in it.