[header] How to clean a ceiling fan [title] See if your vacuum cleaner has a ceiling fan or dusting attachment. [step] Many vacuums come with a dusting attachment that allows you to affix a brush over the vacuum's hose, making it easy to dust surfaces without having to worry about scattering dust everywhere. You'll need a dusting attachment if you choose to vacuum your ceiling fan. 
If your vacuum doesn't have one, they can usually be purchased for around $10. [substeps] For best results, use a dusting attachment that is wide and flat, not circular.