I recently got a peach of an E-150 XLT for road trips and carrying my friends around in, and I quickly noticed that the passenger seats (that, by appearance, likely went unused for 11 years) feel pretty stiff and dry, and have began cracking now that they're being used regularly. What kind of conditioner would y'all recommend I use for these seats? Just want to prevent them from getting any worse, for reference the driver's seat isn't cracking like this. I'd appreciate some interior care tips, I have no personal frame of reference as my other daily has cloth seats. Thanks!!