Firefox keeps form data on reload

I have a big problem with the functionality in Firefox that keeps data that the user have filled in on reload F5. If i use Ctrl+F5 the forms are cleared and this is great. My problem is that not all my users know that this is what they have to do to force the input cleanup. Is there a way in the html or response headers to tell Firefox to not keep the data in the forms?

Just add autocomplete="off" to your inputs and you will solve the problem.

<input type="text" autocomplete="off">

jQuery to solve this on all inputs and textareas

$('input,textarea').attr('autocomplete', 'off');

Instead of going through all inputs you may also just add the attribute to your form-element like so:

<form method="post" autocomplete="off">...</form>

However the above mentioned methods on domReady did not work for me...