Care for it like a close friend you haven't seen since your school days, like a warm memory from a childhood holiday, like an... ahem sorry. These cases are tough so they mostly take care of themselves. If yours gets dirty, just wipe it with a damp cloth until it shines and let dry. Do not use any chemicals like alcohol and do not submerge in water, it's water resistant but not waterproof. So you can take it with you for a rainy stroll but not a dive in the pool ;)