Avoid scratching the RIMOWA Twelve Bottle Case against abrasive materials. To remove dust or dirt from the aluminium shell or interior, use a cloth dampened with clean water to clean gently. Any stubborn or sticky residue should be removed from the aluminium shell using a wipe pre-soaked in alcohol such as Isopropyl. Keep your leather handle in good condition by avoiding prolonged contact with materials that may transfer coloured pigments onto the leather, protecting it from humidity, and keeping it out of direct sources of heat or sunlight.