How do I permanently delete incognito history?

How do I permanently delete incognito history?
Clear your history

On your computer, open Chrome.
At the top right, click More .
Click History. History.
On the left, click Clear browsing data.
From the drop-down menu, select how much history you want to delete.
Check the boxes for the info you want Chrome to clear, including “browsing history.”
Click Clear data.

Clear your history
  1. On your computer, open Chrome.
  2. At the top right, click More .
  3. Click History. History.
  4. On the left, click Clear browsing data.
  5. From the drop-down menu, select how much history you want to delete.
  6. Check the boxes for the info you want Chrome to clear, including “browsing history.”
  7. Click Clear data.