What was found
UPON GEAR EXTENSION FOR LANDING, GOT GREEN LIGHTS FOR MAIN GEAR, GOT RED LIGHT FOR NOSE WITH NO GREEN LIGHT. FOLLOWED QRH WITH MANUAL EXTENSION, NO CHANGE. LANDED WITHOUT INCIDENT, STOPPED ON TAXIWAY, HAD ANOTHER SWIFT PILOT PIN NOSE GEAR. TROUBLE SHOT AND FOUND DRIED CORROSION PREVENTION FLUID ON NOSE LANDING GEAR DOWN SENSOR. CLEANS NOSE LANDING GEAR SENSOR AND PERFORMED OPS TEST IAW AMM 32-61-00. NO DEFECTS FOUND. ALL INDICATIONS NORMAL.