Glad to hear your up and running.
Keyboards are never the easiest things to clean, but it depends on how the G15 is constructed.
I have afew Logitech wireless keyboards (which are alittle old) but both have the same type of keys and are basically a membrane keyboard.
Its relitavly easy too use a small flat blade screwdriver too remove the keytops and give the keyboard a good clean once in a while , does mean you have too remeber the order the keytops go back in , but as long as you dont damage the membrane it wont hurt the keyboard at all. Probably best to do it with the keyboard unplugged too
However if the G15 isnt constructed like these and you try it and break your keyboard , I cant be held responsible, its just a suggestion
If it has had a pop spill and its got under the membrane, then that would be a much bigger job of taking the keyboard to pieces and carefully cleaning the contacts. Usually the membrane isnt accessable just by removing the keytops. But if that had happened I would have expected keys just not too work at all and cleaning might not help and most pop is fairly corrosive to electrical goods.
*EDIT*
Here's a site explaning probably in more detail (scroll to the bottom of the page)
http://www.helpwithpcs.com/maintenance/cleaning-keyboard.htm
