While the coating we use on the wood provides some great protection against daily wear and tear, scratches, and some resistance to water, it is very important to remember that this is still real wood. Large swings in temperature and/or humidity will cause the wood to expand and warp. This is nearly impossible to avoid without essentially turning the wood into plastic.Here are some tips to extend the life of your Keyway case:Don't leave the case in direct sunlight for extended periods of time. If you get the case wet, wipe off as much water as you can right away. Leaving it sitting in water will warp the wood.If you're going to be out on a hot day with your phone in your pocket, put the screen against your leg instead of the wood. Your body generates a lot of moisture that will be soaked up by the case!That's about it! High heat and/or humidity are the main things you need to watch out for.