I use blower and brush. Those blower then u usually can get from big camera shop, use by those camera enthusiast to clean their camera. But, I got mine at Digital Mall, Sec 17 PJ, cost me less than RM30. Brush, I just get those school watercolour brush.

BTW, confession, I am beginner at IT , therefore, dont dare to remove out any hardware to clean one by one, scared spoilt, so, just remove the casing, use blower to blow, if use mouth, scared sliver drop in, computer kena H1N1, die off.