How to let Varnish uncache?

Hi I used your free version. It is awesome. But it is cached by Varnish, I tried below to uncache it. But it seems not working. What others do you suggest?

# Woocommerce
if (req.url ~ “(cart|my-account|checkout|addons)”) {
return (pass);
}
if ( req.url ~ “\?add-to-cart=” ) {
return (pass);
}
# Yith Wishlist
if (req.url ~ “(my-account/wishlist)”) {
return (pass);
}