I have had the vehicle for about 8 months and started to notice around month 4 that the driver seat was darkening -- not soiling but darkening! I wasn't sure what was happening so I had the car detailed and asked around if anyone else had heard of or had the problem. I've had the car detailed again and it's not helping, but I've seen on the web that others have complained on insufficient protectant and premature soiling on Toyota fabric interiors. Would love to hear from others who have had the same experience. Thanks!