I'm not seeing updates to my site after I make css changes.

I'm not seeing updates to my site after I make css changes. I do have another caching service in addition to Hummingbird but the changes still don't show after I clear that cache along with the browser cache. The only way I can see my changes is to disable Hummingbird and re-enable. But then I lose all my configurations. Is there a way to clear that cache?