Slimjimtell

We've been using dawn for years in the home furnishings business, it is not harsh when deluted. 90% of dirt and grime in a car is oils from your hands, hair, petrolium based scuff marks from rubber shoes and such. The dawn is able to cut that grease effectively without being harsh on the leather. Leather in cars...even Lexus is usually a lesser grade of leather than what is used in your home. The car endures harsher temperatures and more elements than a leather sofa. The top coats applied to the leather are tougher and thicker, therefore you get more top coat than leather that is embossed with a leather grain. Lexus leather is a top grain, but heavily pigmented to protect it. Analine died means it is died all the way through the hide.

So, dawn deluted is not harsh and works very well. Woolite will take much more elbow grease, but is a very effective cleaner as well, it's not as good with getting the grease and oils off.

I can tell you from a detailers experience. NEVER use harsh chemicals on your leather seats. The BEST way to clean your leather interior and all trim parts inside your car is to use Dawn Dish Soap, diluted with warm water just like you would use to wash dishes. Use a clean white rag. You will get the best results with this method and the interior of your car will not smell like a chemical factory. It will also be very gentle on the perforated holes in the seats. Any cleaner that may have a bleach in it will weaken the stitching in the seats over time.

After cleaning...

Use a leather conditioner, just be sure to not goop up the holes in the seats. Put conditioner on white rag, fold rag over and rub together to saturated the rag. Never put conditioner directly on the surface or spray on the seats.

This is also a much more Eco friendly method of cleaning and I can tell you for a fact, you see amazing results, without the harsh chemical smell in your car.