Suggestions for cleaning wheelchair upholstery?

Needing to know of any techniques or chemicals to help clean a chair made with polyurethane foam padding encased in porus vinyl like material. It is black colored, so I hesitate to use bleach. Thus far, I've used a car wash with pre-treating the spots on the chair scrubbing with dial bar soap using Spray N Wash as a lubricant. It cleaned well, but odor still was present, although lessened. I need some ideas of what works for you; chemicals that will not create allergies to the wheelchair user (lives in chair 24/7) and does not ruin fabric. Thank you for your help !

You might try some greased lightening and rinse and dry well, then you can get a product called OUT in the pet section of Walmart to eliminate odors, it has a pleasant smell and works on a enzyme. You might also want to check in to a rubber sheet for the seat of the wheel chair and cover with a soft blanket that can be washed.

Go to an auto parts store and buy some leather cleaner. It will clean it and keep it lasting much longer.

Leather & Vinyl cleaners are available at the auto parts stores, and even at Target or similiar stores. If the odor is from below the surface (in the padding) you might be able to remove it and spray with Fabreze, also available at most stores. Hope this helps you.