The reason you would need to do this would be for one of the following:

Free  Up Disk Space: Deleted files in the Recycle Bin still occupy space on your hard drive. Emptying it helps reclaim that space, which can be especially important if you're running low on storage

Improve System Performance: A cluttered Recycle Bin can slow down your system, particularly if it contains a large number of files. Regularly emptying it can help maintain optimal system performance

Security and Privacy: Permanently deleting sensitive files from the Recycle Bin ensures they cannot be easily recovered, protecting your privacy and sensitive information

Prevent Issues with Large Files: Sometimes, the Recycle Bin can take a long time to empty if it contains large files. Regularly emptying it can prevent this issue and make the process quicker and more efficient


You can Empty Recycle Bin via "Domino Help" 

 

To do this, go to your system tray ^

Select the "Domino Help" icon 

Go to Self Service > Empty Recycle Bin

 

This will clear your "Recycle Bin"