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I found iClean in my local apple store. I think it is the same thing as iKlear. Made by Monster... http://www.amazon.com/tag/monster iclean
Works great for screen and aluminum.

I should add that it does streak but only if the cloth is dirty or if it is really saturated with the solution. I apply with a micro fiber cloth and then buff with another dry cloth. Wax on, wax off Daniel-san!
 
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Remember to have the thing turned off with no power or battery and be sure that's its all dry before you turn it on! ;)

Remember not to use alcohol or acetone on the display. That'll dry it out or something from what I've read.

You definitely shouldn't be using enough liquid of any kind to cause problems with the computer when it's turned on. If you're bridging contacts within the computer when you clean it, you need to stop using a hose to clean it.
 
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