Woo-commerce Plugin Cache problem

Hello., Recently i made site using wordpress. I installed WooCommerce plugin v-2.4.6. I am using Storefront theme v 1.5.0 click here To see my site. Now when we want to remove an item after adding Then problem comes. Cart page and cart in header are creating problem. sometimes from cart page product is removed but not from cart in header and vice versa. I searched on net I did all possible things also i added code to header.php to clear cache

<?php
header("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
header("Expires: Sat, 26 Jul 1997 05:00:00 GMT"); // Date in the past
?>

But after that also problem isn’t resolved. Please Help me. I am allowing guest to buy an item. Any help will be appreciated.