Can you clean the seatbelts in are cars?

[1985_mcss]

I have got blue interior and my seat beats are black in the front. I was wondering if there was a way to clean them? Any help would be appreciated.

Thanks

 

[Oldsmoletick]

What I did on for an AMC was remove the seat belt retractors, extend the belt fully, then put a clamp on the retractor to keep it from spooling back up. I then used upholstery cleaner, water, and a scrub brush. Workks nice, let them dry completely before removing the clamp.