Computer cleaning will always be a big debate. I'm all for it. I've seen first hand the speed increases by using tools like CCleaner, Glary, JetClean, BleachBit, Wise, Auslogics, AdvancedSystemCare, etc. To each his own. I personally use a regimen of 2 different cleaners on the PC's I work on. I have people that I clean their PC's every month via Teamviewer and I clean them out and they are always loving the speed increase. Not only using cleaners but removing stuff out of AppData, ProgramData, Registry for programs that haven't been completely uninstalled. Also cleaning out the old Services that have been left over and also the Non-Plug and Play Drivers that have been left over by programs like AV's. Very important to the speed of the PC, IMEO.