Use Autoglym cleaner and protector. Worth it in my eyes. For the insides I tend to wash the bits that can be, a clean slightly damp cloth for the bits that won't go in the washer, then a good place to let the insides dry out quickly!! Oh, a bit of fabreeze keeps them going for ages!! One last thing. If you don't protect your leathers they go brittle. In a fast off you may as well not be wearing them. They will just fall apart!! As I said I use Autoglym protector. I only use it about once every 2 months although you can use it less.... The bottle says twice a year, more if you the leather goes through extreme conditions.