The reason Chrome is being "Skipped" is because something associated with it is running during the time you are performing a clean.
This can happen even when the Google Chrome browser itself is not open as there may be a Chrome related process running silently, in the background; all internet browsers and associated processes must be closed in order for their files to be cleaned properly by CCleaner.
You may have a setting in Chrome that allows background applications to run after Chrome has already been closed. You can disable this setting using the following steps:
1. Open Google Chrome > click the “More” icon () located on the upper-right corner of the browser
2. Click Settings
3. Scroll to the bottom of the page > click Advanced
4. Scroll to the bottom of the page again
5. Move the Continue running background apps when Google Chrome is closed switch to the left, to the Off position
After you've disabled this setting, run CCleaner again to see if the problem has been resolved. It should no longer skip Chrome.
Note: When cleaning, CCleaner may generate the following notice:
When you see this, click Yes to allow CCleaner to close Google Chrome and/or its related processed.
If you do not see this notice, or similar, when cleaning, you may have opted to 'Do not show me this message again”. To turn this setting off, you must restore CCleaner’s default settings (in CCleaner's Options > Advanced menu) in order to restore these notifications.
Note: Restoring CCleaner's default settings will reset all customized settings in the software.