lol, water blaster...im not sure about that
For the Dust, used compressed air in a can and make sure you dont tilt it or anything when spraying it. You can also use a fine brush to clean someparts out. As for LCD screens, best to use the cloths you get with glasses cases. The really fine ones for cleaning glasses, specs, shades, sunglasses or whatever that you wear. Also if its a thick smudge of some sort glass solution is good to use... i dont know any names but i remember using it on my screen once.