As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
STARTED AS AN ODOR LIKE BURNED HAIR, EVENTUALLY GRAY/WHITE SMOKE VISIBLE IN THE COCK PIT. SEEMED TO BE COMING FROM THE UPPER WINDSHIELD HEAT LEAD ON THE CAPTAINS SIDE. ALL ANTI-ICE WAS ON AT THE TIME. TURNED ANTI-ICE AND WINDSHIELD HEAT OFF AND SMOKE SEEMED TO STOP.