Cleaners may be useful when you have a small boot disk. But you may just use Window's own cleaning tools, no real need for third party software.
For me the problem is not just some windows and software cache here and there, the problem for me that some software leaves remnants after uninstalling the normal way, for example: context menu items, task schedule tasks, startup items, etc., and the most annoying that some software save the user settings in registry rather than AppData folder, sometimes I change a lot of settings and want to reset it back, but there is no reset button on the software options, so I reinstall it to make a fresh start, to find that it kept the settings because it is saved in the registry, it why I started to use this kind of tools, it can find remnants easily.
I agree with this. What I do is, every few months I manually visit appdata local, roaming, programdata folders to see if there is anything unnecessary in those from the folders like something I installed in the past but those are not in the system anymore. I often find such things and when I do I copy that folder's location and put it in HiBit's force uninstall wizard to scan for any other leftovers related to that including registry entries. HiBit sometimes find those things and I let it delete them.
For some, it may sound odd, but I use HiBit's force uninstall to remove portable apps too.
