Caravan 2001 Airbag light woes

Back in February, I had the clockspring replaced at the dealer on my 01 Caravan because of the airbag light coming on and off randomly. Well, its back. The dealer charged me a couple hundred for 6 months of peace, and I suspect they will charge me again if/when I return it. When it comes on, if I smack the middle of the steering wheel hard a few times, it will go out. I suspect a loose something or other and wonder if I should try to disassemble and find out myself, or should I not risk further trouble. I'm reasonably competent with repairs and simply want to perhaps check the connections, if any, or whatever else I may find, like a bad ground, but I never delved into this system before and need some guidence. Anyone have this problem and fixed it themselves? Rick