Stains can sometimes be removed by using a soapy solution, not detergent. Leather which has been rain marked should be allowed to dry naturally and once dried a good quality leather moisturiser that does not clog the pores can be applied do a test on a part of the bag that isn't seen first. When not in use store leather goods out of direct sun light and do not place dark colours next to light this can cause colour migration which is irreversible. Do not over fill your handbag as over filled handbags can lose their shape. Avoid spraying perfume on or near the bag as it can cause colour bleeding.