There isn't a specific quick key to delete empty rows in Clay. However, we have a method for mass deleting rows. Here's how:
1. Select the first row you want to delete on the left side of the screen.
2. Scroll to the last row you want to delete.
3. Hold shift and click the small box on the left side of the cell.
4. Right-click and select "Delete x# of rows".
For empty rows specifically, you might need to use filters to identify them first. If you need more assistance with this process, please request to talk to a person for further help.