Google chrome css doesn't update unless clear cache

1. Open DevTools
2. Open Settings (bottom right or use F1 shortcut)
3. Check Disable cache (while DevTools is open)

https://developers.google.com/chrome-developer-tools/docs/settings#general

CTRL+F5 : to refresh the page by clearing GG chrome cache.

You can do any of the following options:-

1. Install a Chrome Extension like Clear Cache to clear cache by clicking on icon.
2. Use Incognito Mode and browser your website in incognito mode. Incognito mode won't disable cache clearly. Disabling cache completely may slow down your browsing experience.
3. Use chrome's features like Hard Reload (Clear cache and hard reload). Read this stackoverflow post
4. As @Vitaly mentioned, Use Developer Tool settings to disable cache completely.

Choose what fits you :)