How to reset FB cache?

I am working on a new site and testing the FB likes (small post/pages likes) and have trouble with the cache for the content to the FB like post. It is still posting old content from before I disabled the Maintenance Mode plugin.
I guess I have tested this in all my browsers on all my computers earlier, so have the same result on all of them.. or maybe the content is cashed at FB's servers?

Anyone?