You can clean your leather bag with a soft cloth, avoiding greasy products and water. The leather can be maintained with a suitable nourishing cream. However, you should be careful with certain skins, which require special care. For example, a product adapted to reptile skins should be used for python bags, applied in the direction of the scales. Also be sure to waterproof velvet and nubuck regularly with a spray.
In any case, the best way to clean your Dreyfuss bag without damaging the skin will depend on its composition and the tanning technique used.