With any natural product, your leather goods do require care to ensure they will be admirable for times to come. Avoid rubbing your casing against rough or sharp surfaces to minimise scratching.
Avoid bringing your products into contact with dark articles of clothing that may impart colour. You will need to protect your case from humidity and temperature extremes and avoid harsh chemicals or prolonged periods in direct sunlight. If your casing does get wet, gently pat dry immediately with a soft cloth. If your casing appears to be marking simply use a damp cloth and wipe and dry immediately. Please note with time leather ages - this is a natural process.