Pull the steering wheel off and tighten the screws that are holding the hazard flasher housing in place. I betcha they have backed out a bit and are grounding against the back face of the steering wheel. If you look really carefully before removing the steering wheel, you can probably see the backed-out screw in question.
Been there, done that.
The only scary part about this procedure is unplugging the airbag connector. Ground yourself against something metal before you touch that thing. I've had mine off a couple of times, and haven't blown myself to bits yet, but your mileage may vary
Everything else is easy. Make sure you mark where the steering wheel is positioned so that you don't put it back off-center.