I was curious what you guys use to clean and condition the leather in these cars. I have the grey napa leather, and I have noticed some slight discoloration on the driver bolster in the month I've had the car. I wear jeans a lot so I'm not sure of that makes a difference. I've never had a car interior this light. (God help you guys with the white interior). Do you have to use a special conditioner with the napa? The texture seems different than regular leather.