Hello, My gf’s car has had this leak in the heater hose. It causes it to lose coolant over time but only while the car is off. Never overheats when on but leaks out coolant once the car sits. The coolant seems to be coming out of the quick connect fitting attached to the heater hose. Can’t find anything online and my gf doesn’t feel comfortable with us trying to fix it without instructions or guidance. Does anybody happen to know how to remove this fitting? Any help is greatly appreciated.