Some time ago I spilt soup on my passenger seat (don't ask) and tried cleaning with those dry foam cleaners and car upholstery sprays to no avail. I'd also noticed that my drivers seat was looking a bit grey with red stitching no longer as bright as it once was. So today i bit the bullet took passenger seat out of the car and removed the base foam and cover then chucked the cover in the washing machine, with it set to hand wash 25 degrees! What a result, it looks like new, nice bright red stitching and lovely black again! next drivers side ! So if your brave and have an hour to kill give it a go! At your own risk of course!!