Cleaning up CSS files

Have a look at excellent firefox addon:

Dust-Me Selectors

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This site has some nice tricks about what you need to do http://www.makeuseof.com/tag/useful-tools-to-check-clean-and-optimize-your-css-file/.

It suggests some tools like a Firefox plugin called Dust-Me selectors.. http://www.sitepoint.com/dustmeselectors/

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