Can’t Clear Cache

Hey there. I’m trying to clear the cache via the toolbar at the top of the admin panel and also the PageSpeed Ninja -> Advanced -> Troubleshooting -> Clear All button but it’s not doing anything. No errors given in the console, just doesn’t clear the 48199 files(s) there. This is a big problem for me because my host has limited inodes (files) and this is causing me to get very close to exceeding that hard limit. I tried turning off the only plugin I can think of that may conflict (Siteground’s Speed Optimizer) and also tried it in incognito mode in case it was a browser plugin conflict issue. Is there something I can run manually somehow to force it to clear the cache? I assume deleting the content of the /s/ folder is a bit of a no-no? Any help greatly appreciated.