What was found
AFTER TAKEOFF WITH THE GEAR UP THE RED NOSE WHEEL LIGHT REMAINED ILLUMINATED. RAN QRH 32.9, LIGHT EXTINGUISHED. INSPECTED NOSE GEAR UPLOCK SENSOR & FOUND TO HAVE DIRTY GREASE AROUND SWITCH ROLLERS. CLEANED, CHECKED WIRING & SECURITY, NO ISSUES NOTED. OK FOR SERVICE AT THIS TIME IAW AMM 32-60.