cookie session time for uncompleted orders

[llegrand]

I have one site  that is having an issue with customers and not being able to delete cart items.   There is a persistency of the session cookies for items in a cart that remain when they close the browser (and often don't log out),   

If they remove an item, leave the cart for some reason.   Go back to the site an hour later,  the "removed" item is still in the list.   

What is the length of time for cookie in this operation?   Where would I set it to be lesser?  Is there any other way to "force" and update of a session?

Thanks
Lee

[Basara]

Once we catch similar issue but with adding product https://github.com/abantecart/abantecart-src/issues/120  It is very rare

[llegrand]

Okay,  I have looked at the github -  but clearing the browser manually of all cookies and cache does NOT solve the problem

It is in the cart pages,  and it will not clear.  This is on 4 different customers for this site.
What I would like to do is clear the db manually but I am not entirely sure where the "incomplete"  order information is held

If you can tell me the db table(s) for that,  perhaps I can remedy this.
Thanks
Lee