Best way to clean Logitech MX Optical mouse and Logitech keyboard

[Link19]

Could someone please help me on this. I have a Logitech Optical Mouse that I got for my birthday in March 2001. Over time it got dirty. I just got a new one about a week ago and I want to know how to clean it so it doesn't get dirty over time like my old one did. How often should I clean my mice? I also would like to know how to clean a keyboard and how often it should be done. Even though my old mouse got dirty, it still was working, but I assume a mouse and keyboard being dirty still is not healthy for them so that's why I should start learning how to clean them. I am looking for a safe and effective method to clean them without danger of breaking the mice and keyboards I have. Help greatly appreciated.

 

[xSauronx]

umm....
i dont clean my keyboards really, unless i spill something
then i use an electrical contact cleaner, or alcohol, since it dissolves quickly and completely

and i never had my optical mouse get "dirty"
ive had the same one for 3 or 4 years, whats dirty on yours?

id stick to alcohol anyway, or something else without moisture that will dry very quickly, if you need to clean electronic stuff of any type
perhaps thats just me though