Q: Cleaner

Shut off the computer.

Use a damp but  not wet microfiber cloth to clean the screen and keyboard.

For more info:

http://support.apple.com/kb/HT3226

Hope this helps.

For the display, I use iKlear which used to be sold in the Apple Store (distiller water is good as well).  For the rest, I dampen a soft cloth with a household cleaner and rub away.

Ciao.