Ccleaner only cleans part of what it is supposed to.

CCleaner for Windows
1

When I run Ccleaner it shows that 558.3 MB to be removed. After I run cleaner only 67.8 MB is removed. Why?

2

If you go to 'Options>Advanced' do you have the box "Only delete files older than 24 hours" ticked?

3

To clean your browser's cache, it must be closed :)