Navigate to the individual leaf org/location where the comment was posted
Click on the account dropdown in the upper right corner and click on the settings icon to view your “Organization Settings”
Click on the “Customer Comments” tab
You can search for the comment you want to remove, check the box next to it, then click “Ban Comment”
Please note, you’ll see active comments (can run on screen at that time) and inactive comments (older comments that should no longer be running on screen).