How should I clean the computer case safely?

For light stains or dirt, use plain water with a clean, lint-free cloth or swab. For stronger stains, use a mild dishwashing liquid diluted with water, then rinse by wiping with a cloth dampened with clear water. For stubborn stains, use isopropyl (rubbing) alcohol, which requires no rinsing as it evaporates quickly. Always unplug the computer before cleaning with liquids or damp cloths. (Page 13)