Originally posted by: ChaoZ
What are you suppose to clean the mouse and keyboard with? Just wetting my cloth isn't working anymore. I want to use soap, but not sure if it's safe. Any household products that you can use?
		
		
	 
Spit, drool, a little ketsup and mustard from the burger at lunch, oh and rinse it down with a nice fresh hot helping of black coffee. Let it set for two days, and viola! Now that the keyboard and mouse are destroyed, you now have an excuse to replace them with a brand-new set. And - here's the good part - the brand-new ones come 
pre-cleaned from the factory. Amazing! All this and more, only $19.99. Operators are standing by; order now!
Sadly, for a modern el-cheapo-built keyboard, that may seriously be the best course of action. For something a bit older, something with "real" keycaps, you can usually disassemble the keyboard, pull the individual caps off of each key, and wash in a sink full of warm, soapy water, rinse, let dry on a towel. For the base mechanism, pick out the hair, and use compressed air, cloth with warm water, or a q-tip, as appropriate, to clean the various areas, being careful not to soak the keyboard-encoder chip while doing that.
Most mice can be similarly disassembled and cleaned - rinse/wash the outer shell and plastic parts, and carefully clean dust/hair/lint out of the PCB and sensor portion. I'm not even sure that would ever be necessary with an optical mouse these days, unless you somehow got enough dust inside to gum up the buttons. (Perhaps hair or lint could accumulate in the wheel, I suppose.)
I've done it with both, it's not difficult if you are patient and careful not to destroy things when taking them apart, but it does take some time. If your time is valuable, then simply replacing them might still be easier and possibly cheaper. You could always donate the older ones to the Salvation Army or another charitable org that resells/re-users computer parts. (Tax write-off too?)