Test the friction and retraction by drawing out the entire length of the leash and letting it retract.rnUndo the fasteners on the side of the retractable leash.rnCheck that the spring is working correctly.rnWhen it is operating suitably, the pressure in the spring will heighten the moment you pull the leash out from the coil.rnReplace all the screws and plastic casings, then draw the leash out repeatedly