Using this leash is easy. First, attach the two snaps on the double-ended leash to the front and back of your PetSafe 3 in 1 Harness and Car Restraint. When your dog starts to pull, the leash design helps you redirect their movement safely. If you don't need the extra control, simply convert it to the 1.2 m leash. As for maintenance, keep it clean by wiping it with a damp cloth. Avoid using harsh chemicals. Store it in a dry place when not in use. Always check the snaps and hardware regularly for any signs of wear and tear. Also, make sure the leash is appropriate for your dog's size and strength.