From the tests run by Magnet forensics using Internet Evidence Finder, it appears that CCleaner could do a better job of cleaning PCs. CC is certainly a good tool, but I'm just suggesting that further effort could be made to improve the cleaning.
The article I refer to is worth reading for what CC may not clean, and may never be able to clean, such as RAM, pagefiles, and hibernation files.
The article concludes with:
"The point of this post is to illustrate that the potential benefits of running a search for Internet related artifacts is well worth the effort, even when you fear they may have been ‘sanitized’."
-------
I tried posting a link to the website that did the tests, but Piriform.com does not allow a link to the site. Unfortunate, since readers here should be able to read unbiased reviews of Ccleaner and similar software to be able to understand their limitations. To find the article you can use the topic title.