You can manually start a filesystem clean from the CLI:

1. Log into the CLI using SSH (or via serial) using an account with admin privileges.
2. To check how much space you will gain by running the clean, type:

   filesys show space

   The column Cleanable GiB will show the amount of storage that will be cleaned.
3. Start the filesystem clean by typing:

   filesys clean start

4. To monitor the process, type:

   filesys clean watch

   The monitor will run continuously in the CLI. Use Control + C to return to the prompt.