Now that Im getting some more expensive bags Im wondering if I should do any kind of waterproofer or conditioner on them. In the past I just bought 1 or 2 less expensive bags and used them until they were beat and trashed them. With bags costing up to $800 that obviously isn't an option lol. So far everything Ive bought is leather (no suede, canvas etc). Also, should I clean them occasionally and what would I use? I don't want to change the color of the leather at all thanks in advance!