Here's another tip. FWIW, I have sand beige seats. I use the following products depending on the season - Leatherique Pristine Clean & Rejuvinator. I usually do 2 deep cleanings/condition a year. In between that, it's just water or Griots Interior Cleaner. Griots Interior Cleaner is a ++++. It's the only product I use from them other than their $$$ car wash.

Anyhow, the trick is a BHB (board hair brush) IMO. I've always just used a nappy terry when cleaning the leather BUT you would be amazed by a brush type product can do.

My regimine is to vacume the seats thorougly, even using the fingers to split the creases open, etc to get it real clean. Hell, I even recline the seats backwards, tilt, etc. The BRUSH IS KEY IMO. Spray whatever cleaner you are using and just gently use the brush to agitate. It scrubs the leather much better than just using a towel to rub IMO. It's the only way I clean the seats since trying this method and seeing the difference !