My XK has light colored seat belts that are very dirty and I can't find anything to clean them. Any ideas?

 

try using Woolite with a 5:1 ratio with distilled water or Optimum Power Clean with brush. let air dry before letting it retract back in. you can also try steam cleaning.

 

Usually this is an oily type of soiling. If it is REALLY dirty, you can clean it with a degreaser/hand cleaner type of product, in Canada we use "lustre sheen" hand cleaner. After the belt is cleaned up, rinse off and mop up the hand cleaner residue with water and a few clean rags, then follow up with soft soap and water, rinsing often. They should come up just like new.

 

https://www.youtube.com/watch?v=ENck1phBBpM

Vector

 

Woolite and steam.....both great suggestions

Seat belts can be extremely finicky to clean due to the make up of the tightly woven material..