In talking with just about every uphoster I've ever conversed with, the answer has always been the same:
Mild soap and water - that's it.
Just some dawn diluted with water in a plain squeeze bottle. Spray on, wipe off.
If it is just dust, use a small detailing brush to brush off the dust.
Stay away from vinyl "conditioners" "cleaners" and such, especially anything made by Armor All. Armor All works by removing the top layer of whatever material you wipe it with. This makes the surface look look nice in the short term but promotes premature aging.
Mild soap and water - that's it.
Just some dawn diluted with water in a plain squeeze bottle. Spray on, wipe off.
If it is just dust, use a small detailing brush to brush off the dust.
Stay away from vinyl "conditioners" "cleaners" and such, especially anything made by Armor All. Armor All works by removing the top layer of whatever material you wipe it with. This makes the surface look look nice in the short term but promotes premature aging.