Stains, scratches and patina belong to the normal ageing process of your item. Differences in tone, shading, gradation, and the possible alterations of the material are to be regarded as a sign of quality.
Water snake is a fragile material that requires a special treatment. We highly recommend to ask a specialist to condition this type of leather. Avoid water. To soften the leather, a bit of vaseline or glycerine soap can be applied using a soft cotton cloth : make sure to apply the product carefully, in the direction of the scales, without rubbing.