There are add-ons that will only delete the cookies you don't want.
Depends on what browser you use of course.
Good idea. Thanks. I did this on Chrome and deleted anything nytimes:
Delete specific cookies:
On your computer, open Chrome.
At the top right, click More. Settings.
Under "Privacy and security," click Cookies and other site data.
Click See all cookies and site data.
At the top right, search for the website's name.
To the right of the site, click Remove .