The cache hit rate is probably low as a result of the amount of times we tried clearing it during the troubleshooting process.
It should start to pick back up now as long as we're not hitting the 'clear all' button as frequently as we have been over the last two days.
To look for other ways to optimize, we suggest searching support.ezoic.com for 'caching' and there are several guides to help you along 🙂