I use two products on my customers and my own rides. First thing is to clean the surface and I only use one product for that, Griots interior cleaner. Its the best product for cleaning leather surfaces w/o fear of damaging it. I also use Griots leather products, they have a regular conditioner as well as a product for older leather, both are great and smell like they melted a baseball glove into the bottle. The next product is something I found over at Top of the Line detailing products (online store) called Leather Master. Half of the bottle is in German because its made there, but this stuff is awesome. Once you apply it and wait a half and hour your good to go as its soaked into the seats and you don't stick or need to rub it in a bit more. Its pricey at $20.00 for 250 ml (sorry, thats the way they sell it) but I'm going to be buying the stuff by the liter (its $60.00) because it makes more sense for me since I detail cars on the side. Good luck with your car guys.