Cleaning leather for my Lex..

I purchased a brand new Lexus IS250 a couple months ago, and have tan interior. My leather seats are turning dark and I need to know a product I can use to clean it, that is affordable. I have taken my car for detailing before and this costed me $100 at the lexus dealership. I can purchase the lexus cleaner from the dealer at $15 a bottle, but want to know if there is a more economical way of cleaning my seats.

I have considered detailing again, and then purchasing car seats.

Saddle soap.

meguires sells a awsome leather cleaner and conditioner.. you can find it at your local auto parts store...i use it religously every 2 months or so in my durango seats...

Meguiar's is good. I use it on my car's leather. There's a cleaner and a conditioner.

The cleaner on their website is $7.59 a bottle. Any good auto parts store will carry this, probably for a bit less.