My 1997 Miata with tan interior has seat belts that don't smell fresh and also tend to leave tan marks on clothes, especially if the belts are damp.
Is there a good way to clean seatbelts?
I just dilute simple green and gently brush in, then use a damp cloth to wipe clean and a dry one to get as much of the water out as possible.
I don't know if it's technically correct or not, but I avoid SG on seatbelts because of the alkalinity. I prefer Dawn. I also use towels instead of brushes in order to try to be easy on the webbing.
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