If you like to remove unwanted posts from one specific subscription or container rather than from all subscribed ones, then follow the instructions given below:
- Open context menu of that subscription or container in which you like to sweep unwanted posts
- Select 'Sweep inside' menu option which opens up 'Post Sweeper' dialog
- Set the sweeper filter based on which posts you like to remove
- Click 'Sweep' button to start sweeping process.
To learn more about how to set sweeper settings, check following related help topic.