Why does % Cached on dashboard vacillate? For a while, I struggled to get it above 17%. I created some page rules and it steadily increased to 42% cached. Now it’s down to 37%.
If something is cached – and cache is not cleared – shouldn’t % Cached stay constant – or at least not decrease?
Also: How can increase % Cached? I’ve followed many posts here but can’t get it above the 30% range or so.
Thank you. 
Every Cloudflare datacenter has an independent cache. And anything that’s cached doesn’t stay in cache forever. It can get evicted quickly if it’s not used.
So…visitors/crawlers from different regions are going to hit different cached or non-cached assets at different times.
The only way to get high cache hits is if your site doesn’t have a wide variety of cacheable files, and has high traffic (lots of hits to limited files).