Clean Your Screen With -- ?

Maybe you noticed the article on cleaning your gadgets in the January issue of Popular Mechanics.  But let's see what Apple says.  Here's some specific info to read on cleaning your computer.  It warns that liquid damage is not covered under the Apple product warranty or AppleCare protection plans. Here's how to clean keyboard, trackpad, mouse.  A comment following this MacLife article mentions the Optical Cleaning Kit from CostCo.  Anyone use this?