Amazon S3 and Cloudfront cache, how to clear cache or synchronize their cache

Question

I have a cron job that runs every 10 minutes and updates the content-type and x-amz-meta. But since yesterday it seems like after the cron job run, Amazon is not picking up the

Answer 1

(edit: Does not work)As of 2014, You can clear your cache whenever you want, Please go thorough the Documentation or just go to your distribution settings>Behaviors>Edit

Object Caching Use (Origin Cache Headers) Customize

Minimum TTL = 0

http://docs.aws.amazon.com/AmazonCloudFront/latest/DeveloperGuide/Expiration.html