As some of you know, my Lexus SC430 has the Ecru interior (cream white) and is always being cleaned non-stop.
First, for a cleaner, go to your Lexus manual and under leather care you will see that they reccomend a detergent used for wool.
The best cleaner I've found and I'm sure you already have it in your home is Woolite.
Mix 6:1 (6 parts distilled water, 1 part Woolite) in a spray bottle. Get some terry towels and dampen them, have a few that are dry as well. If you need to use a brush, use ONLY a horsehair brush. Any others will mark the leather. Apply the mix, brush if needed, grab your damp towels and wipe off excess. Use the dry ones to dry the leather. Let the leather get completly dry.
Apply a SMALL amount of Zaino Z-10 on a applicator and rub into leather. Use a dry towel to buff off any excess. Re-apply if needed.
The Z-10 so far is by far the best smelling thing to new leather I've had. They call it "Leather In a Bottle" and they arn't kidding.
Z-10 leaves a nice matte finish, not greasy and keeps the leather soft.
Enjoy the Z-10!
Regards,
Deanski