There's probably a kext file still in your system that's loading at boot. If you just deleted the CleanMyMac app you didn't do enough to rid yourself of the app and its support files.
Do the following: Boot into Safe Mode according to How to use safe mode on your Mac and download and run the shareware app Find Any File to search for any files with the application's or the developer's name in the file name. For CMM software you'd do the following search(es):
1 - Name contains cleanmymac
2 - Names contains macpaw
Any files that are found can be dragged from the search results window to the Desktop or Trash bin in the Dock for deletion.
FAF can search areas that Spotlight can't like invisible folders, system folders and packages.
Note: if you have a wireless keyboard with rechargeable batteries connect it with its charging cable before booting into Safe Mode. This makes it act as a wired keyboard as will assure a successful boot into Safe Mode.
Also, CMM is considered to be akin to malware by many of the contributors here in the ASC.