Proc-folder: App generated almost a thousand sub-folders When I was searching with the "File Manager" app (com.alphainventor.filemanager) for some files in the root-folder, it generated hundreds (almost a thousand) folders in the proc-folder.
[I don't have root-access btw., but still can see some files there.]

They're named just 1, 2, 3, 4, etc.
Each folder has about ~40 files in it.

I already found out, that those are virtual files, that eat like no space.
However I would still like to clean those up.

Is there any smart way to do this?
I was hoping, they would be removed by restarting the system or deinstalling the app, but so far nothing worked. :/

I am on an LG G7 with Android 8.
Any help would be greatly appreciated.
/proc is very special in that it is also a virtual filesystem. It's
  sometimes referred to as a process information pseudo-file system. It
  doesn't contain 'real' files but runtime system information (e.g.
  system memory, devices mounted, hardware configuration, etc). source


Therefore the directories and folders you observe just represent the processes started by the app. If you see them that the app has still running processes. Some apps contain ant-reverse-engineering technologies by using multiple processes for monitoring each other. Also the Android system may start multiple smaller processes for one app e.g. for background service(s). 

Conclusion: The proc file system is nothing you should worry about. Just ignore it.