We try our best to design a product to be as resistant as possible to any kind of external damage, which includes resistance to scuffs, dirt, and discoloration. Unfortunately, there is a limitation when it comes to it being dirty over time depending on the environment you use the case in.
Like all products, it is noticeably easier to spot something that is dirty when it has a brighter color in contrast to a darker colored one. For example, a pair of white shoes will look dirty if not taken care of properly in comparison to a pair of black sneakers.
To clean our case, you can clean it with water and a magic sponge (a.k.a melamine foam). Or you can add non-alcoholic detergent (with no bleach) with water, soak the case in it for at least 30 minutes. Then clean it with the magic sponge again. We do not recommend using alcohol-based substances to clean it, as it will damage the outer coating.
If cleaning it with water and/or magic sponge does not solve the issue, please contact our support agents and they can help you with this.