Empty your bag and remove loose dirt with a soft brush, a lint roller or the brush attachment of a vacuum cleaner. Use either a specialist leather cleaner or a small quantity of warm soapy water and gently wipe the bag with a soft cloth. If you are using soapy water, towel dry the bag immediately. Never saturate leather with water and never apply chemical cleaners. Depending on the conditions to which it is exposed, leather will dry out over time and its fibres become brittle and crack. To prevent this, you need to replace the leather’s oils after cleaning.
Use a conditioner which is an emulsion of natural oils and waxes and which is easily absorbed into the leather. The application of beeswax will help waterproof the leather.