I have CCleaner version V5,11.5408 and it used to work perfectly but I have now installed Windows 10 and am finding that it is so slow to clean Microsoft edge that it is unusable. When the pop up to close Microsoft Edge Cache appears I click yes but after several hours it is still cleaning Microsoft edge and the progress is 0. Even after leaving on all day it is still cleaning and progress is 0. A list of Microsoft edge cache scrolls through albeit very slowly so it is cleaning something and is not hanging.
It may be worth cleaning them from within Edge itself to clean things up a bit first.
Right hand side top of Edge page, three lines (hamburger) near star, then click on the clock like symbol.