V6beta cache clearing tips?

Any tips on how to clear the cache? I can’t find it and I can’t clear it in the beta. Installed the nginx helper plugin to no avail. Looking in the nginx.conf file and think I see redis defined, tried to use that in the nginx helper instead, did not work either. Basically, if I am logged in things are not caching and the site looks as it should. But any non logged in users see a very old page that won’t clear, no matter if I restart the site, reboot the machine, try to use the purge cache command from the plugin, nothing. Any clue?