A clean keyboard is like any tool that when constantly cleaned works perfect. I prepared here some simple ways to clean your keyboard. All you need are dry cloth or duster, cotton buds, can of compressed air( can be bought at convenience stores ), lint free cloth and suitable cleaning fluid ( isopropyl alcohol). Here's how to do it.
Step 1. Shut down your computer and unplug your keyboard.
Step 2. Hold the keyboard upside down and tap with your hands couple of times so any debris would fall down.
Step 3. If compressed air is available use it around each keys of the keyboard.
Step 4. Use the cotton buds put alcohol on it and use it on the sides and top part of the keyboard.
Step 5. Use the lint free cloth to wipe the whole surface of the keyboard.
I advice that you should do this at least every week.