Q: What is best thing to clean the screen and touchpad with on a Macbook May "13 2009 white model?

You can clean your screen using the steps found in this Apple article. It states -

"To clean the screen on your MacBook, MacBook Pro, or MacBook Air, first shut down the computer and unplug the power adapter. Dampen the included cleaning cloth with just water and wipe the screen. Do not spray liquid directly onto the screen."

Best of luck.