why won't cloudflare purge cache for my saas app?

hey everyone, i'm completely tearing my hair out here. i just launched a pretty big new feature for my saas app, something users have been asking for, but nobody can actually *see* it. it's incredibly frustrating, and honestly, pretty embarrassing for my brand right now. the problem is, cloudflare's cache just isn't purging properly, or at least it feels that way. i'll push an update, deploy the new code, and then for hours, sometimes even a full day, users are still seeing the old version of the page or the old data. my customers are complaining like crazy, asking why the new stuff isn't showing up, and i just don't have a good answer. i'm at my wits end.

i've tried everything i can think of. i've hit "purge everything" in the cloudflare dashboard so many times my mouse finger is getting tired, i've tried purging specific urls, even went as far as messing around with the api for a targeted `purge cache` by url request, but it's like cloudflare just decides to ignore it sometimes, keeping the old content stubbornly alive. what am i missing here? are there some specific `cache control headers` i should be setting on my origin server that i'm not aware of, or maybe setting incorrectly? is there some obscure trick to force immediate invalidation for dynamic content that i'm totally overlooking? i really need to get this sorted asap before i lose more customers over this. any expert advice would be a lifesaver right now.