No they do not get dirty easily as they have self-cleaning function inside them that help clean them from time-to-time by releasing little steam that eliminates all dirt from inside it.. By using different types of detergents they become cleaned even better! White cases are pretty much designed from porcelain that contains silica gel which absorbs moisture so much that moisture never comes into contact with any of its part as they are well sealed so that no moisture gets in between these two parts and this keeps them clean all day long! So white cases are pretty much tough when it comes to getting dirty! But one thing about white cases is that they cannot be used after 24 hours if there is no cleaning done because they get dirtied faster than other cases because they absorb all moisture through silica gel which gets attached with dirt particles in case if it does not get cleaned for 24 hours! White cases are pretty much recommended by everyone who owns one!