Form does not clear

Hi,

Thanks for the plugin! It works perfectly EXECPT after subscribing the form data doesn’t clear.

I noticed this question has been asked earlier too and you replied: “Make sure you don’t have any any js error in your theme/script. It should clear the forms on all browsers”.

Could you kindly explain how / where to check that, pls?
I’m using many kinds of forms on my site without having this problem…

Thanks!

http://ww.wp.xz.cn/plugins/nmedia-mailchimp-widget/