I applied a custom domain for my GitHub pages site, but the CSS and JS files didn't quite work, so I tried to change it back(my domain is hosted by Infinity Free). I cleared the CNAME record on both platforms(Github Pages and Infinity Free), but my GitHub pages domain kept redirecting to the old domain hosted on Infinity Free. How can I fix that?

I've already tried the command:
ipconfig /flushdns
I've deleted the Original Repo, replaced it with a new repo with the same name, and then deployed the Github Pages

Nothing seems to work. Do I need to wait for the DNS to change, or is there any solution