howto purge and view haproxy cache

I have a haproxy 1.9.4 running on CentOS 7 machine with the following configuration

backend test
   acl is_cached path_end .js .css
   http-request cache-use static if is_cached
   http-response cache-store static if is_cached
   server my_webserver 127.0.0.1 check
cache static
    total-max-size 512
    max-age 300s

So is there way to purge cache without restarting haproxy?

How can I view cache?