To keep your bag in top condition, it is recomanded to treat it with neutral color leather fat or with a waterproofing spray on a regular basis. If the leather has a stain, first try to rub gently with clean, lukewarm water. If this does not have the desired effect, take mild soapy water. Never use stain water, solvents, turpentine or shoe polish, as they will all affect the color of the leather or even rub off on clothing. Gently remove grease stains with a dry cloth or kitchen paper. If that does not succeed, do not despair! Most fatty stains disappear by themselves over time!
Beware of heat sources such as ovens or radiators!