A new cmdlet, Clear-RecycleBin, has been added to the WMF5. This cmdlet can clear the recycle bin only for the current user. You can specify a drive letter which means that you can also clear the recycle bin for an external drive.
Below is an example:
PS > Clear-RecycleBin -DriveLetter C:\ -Force
For more information about this cmdlet:
PS > Get-Help Clear-RecycleBin
Thanks for reading! You can follow me on Twitter @PrigentNico