Using Comet Cache with WooCommerce

Following problem when using Comet Cache combined with WooCommerce on: https://vda.gedankengut.media/shop/

Within the header is implemented a counter (in the right corner) that shows the qunatitiy of products which are in the cart. Is there an (easy) way to exclude counter from caching? Otherwise it shows alway “0”.
Thanks in advance for advise