I found these ten office chairs being offered free on a on-line swap site. They are in great condition, just needed some basic surface cleaning.
I put the baking soda in a jar with a 'sprinkle' top.
Sprinkle chairs generously with the baking soda.
Let baking soda set for 30 minutes.
Use vacuum to clean up baking soda.
Measure vinegar and dawn detergent into a mixing bowl.
Use electric mixer on low to mix together.
Scoop suds out and spread onto chair.
Rub mixture into the fabric.
Let set 20 minutes or so, then use a wet rag to scrub/wipe the area you just rubbed into the fabric. Wash out rag frequently.
Fresh & clean!