Over time your new leather accessory can get dirty and grimy. It is always recommended to use a specific leather cleaner to clean it, but a mild soap or dishwashing liquid can work just fine. Use a sponge or a soft rag with, e.g., diluted castile soap (to about 1:10) to wipe clean the leather surface. Then rub the leather thoroughly dry with a towel. Always follow up with a leather conditioning treatment.
Leather skin is porous and highly absorbent of oil. If by accident your leather goods got stained, act quickly to remove the stain before it gets soaked deeply into the leather. One common spill on leather is grease from food. First try blotting the stain with a dry clean cloth to absorb as much oil as possible. Next to remove the remnant grease, try rubbing briskly some white talcum powder (or corn starch) to completely cover the stain. The powder works by drawing the oil out of the leather. Wait for about an hour or two then brush the powder off. Repeat until the stain is gone. This method is proven safe and effective at removing grease stains.
Coffee or tea: If the stain is fresh, try cleaning it with a mild dishwashing soap diluted in water and dabbed with a clean rag. If the stain has dried, try using white vinegar diluted with water; dab it with a rag.
Red wine: Blot the spill with a dry cloth, then use a cloth moistened with white wine to blot the spot. Cover the spot with baking soda and allow it to sit for about 20 minutes, then clean that off with a third clean cloth.