Welcome to AF 05GrandAMowner !!
So your horn just keeps tootin. If you havnt had the steering wheel off, or replaced your multi function sw., then I doubt very much it's the horn contacts(clock-spring) in the steering wheel.
Their is a mini relay in the underhood fuse box, # 21, I'd replace that and see how it does.
If you've had any recent front end collisions, then it could be wiring. But I bet its the relay or the horn its self that is bad.
- Though to remove the air bag you'd need to pull the air bag fuse(s) and disconnect the battery. Using a T20 or T25 torx bit remove the screws in the back side of the steering wheel.
And
avoid static electricity, or you could blow the bag in your face, and that's dangerous!