Hello.
From the screenshot, it looks like Clean All is working as it should. Everything is clean, except for the last 3 buttons, and there are reasons for that:
- All Transients – The transients are created by plugins, so as long as you have plugins installed, whenever a page is reloaded more transients are created. You will probably never get that one down to zero.
- Optimize Tables – This one is not included in Clean All, because it’s a different type of function. You have to press this button by itself.
- Clean CSS/JS Optimizer – This one is also not included in Clean All because it is a different type of function. You have to press this one by itself, too.
If you’d like to know more about the Database Optimizer, take a look at our wiki.
Hope this helps!