Keep in mind that switches that don't use the standard Cherry MX construction style may be different. Topre switch keyboards, for example, need to be pretty much entirely disassembled to access any of the individual stem and spring assemblies. Be careful once the top of the housing comes loose: the pressure of the spring can push the housing and stem up and away. Now you should have three separate pieces: the top of the housing, the stem, and the spring. You can see the bottom of the housing still attached to the keyboard itself. You should be able to completely clean out the switch housing with canned air, Q-tips, and rubbing alcohol. use a light touch. Update your keyboard's drivers . Most of the time, keyboard issues can be tied to out-of-date drivers or software. You can fix the keyboard by updating the driver or software. The easiest way to ensure your drivers are up to date is by using your computer's update utility: This option allows adding a new layout in any color without covering the characters which are already on the keyboard. New layout will be applied accordingly to your keyboard specification. Usually we position the new symbols in right bottom corner but it’s flexible - we can put them in any place as long as they don’t cover the existing layout. Low legibility of the letters is actually a very common problem that makes working on computer pretty uncomfortable. It may start after long time when the symbols get worn-off that much that you can't read them or when the surface gets partially glossy. Greasy marks are perhaps the biggest nightmare as it's barely possible to prevent the keyboard from getting more damage once they start to show up.