As long as you do not "soak" the seat fabric, overly wet it you are fine.
What most do is overwet the fabric, the soil soaks down into the foam and then "wicks" back up later.
That and using a really strong cleaner with a butyl cellosolve surfactant component breaks the boron out of the fabric.
The boron is the fire retardant that is applied to the fabric at the mill.
The seats fabric may feel damp, but should be dry to the touch in an hour or so if you do it correctly.
Most "detailers" over soak seats and they can't tell if they actually cleaned it or not.
Same with the carpets, then later, a few days pass and the "spots" return.
They never actually removed the soil, just chased it down into the foam or padding.
Ketch
