Hey, I deleted Cleanmymac from my iMac and there are still some files that refuse to be deleted. Any ideas that could help

To help in doing a " Scorched Earth " of this computer.

This method will WIPE ALL Data and there is No DATA Recovery - Period.

>> Only works on Intel Based Apple Computer <<

To perform this action will require booting from a Bootable Installer. 

The Bootable Installer can Only be performed on an Apple Computer 

This will have to be performed from a Qualifying Computer to run the version of macOS to be made on the Bootable Installer.

Example : Bootable Installer of Catalina would have to be done on a computer that Qualifies to run Catalina.

Notation: If the computer being used to perform this action is Too New or Too Old to qualify to run the version of macOS - this computer can’t be used.

Alternative is, to gain access to a Qualifying Apple Computer from a family member, friend or associate.

Shutdown computer and disconnect all external drive Except the newly created Bootable Installer.

Restart and immediately hold the OPTION key until the Startup Manager appears and choose the USB Drive. 

It will present options >> Disk Utilities >> View >> View ALL attached Drives. 

Choose the Upper Most Drive ( not the volumes indented and list below ).

The drive normally is called Apple Media or Apple SSD - that is the drive to Erase and format as APFS with the GUID Partition Map. This applies to macOS 10.14 Mojave and above. 

Once that is done >> backup out of Disk Utilities and choose install macOS. 

Follow the prompts and it may automatically reboot several time. 

Do Not Migrate anything other than your User Account

Doing otherwise would bring back the issues like BrickMyMac aka CleanMyMac back into the computer

Effectively negating all the previous hard work you have just finished doing

You likely have to be in Safe Mode to get rid of them.

The perfectly safe etrecheck will help us or you to figure this out.

Safe Boot, (holding Shift key down at startup), does the problem occur in Safe Mode? Could take 10 minutes or more.

Safe mode attempts to repair Disks & clears lots of caches & loads safe Drivers, & prevents loading of 3rd party extensions, so if Safe Mode works try again in regular boot.

EtreCheck can be found here and you can post the free report using the Additional Text option when posting:

Using EtreCheck - Apple Community

> Don't know what to do next

nuke it from orbit, it's the only way to be sure

erm, I meant backup, reformat, install, restore

Erase the Mac.

That's the only way to undo the effects of having used it, or any other so-called "cleaning" scam for that matter. Rule 1 of Macs is don't install junk.