Thanks Janedee and Ms. Earthwalker
I think we will try the denture tablets. My ex Mom in law cleaned her Stanley thermos with denture tablets.
p.s.
Earthy
We don't smoke, in fact we quit 9 yrs ago. We don't allow it in the house or our trucks.
We spent days picking up butts off the ground at our new house after we moved in. It is so gross...lol seeing those nasty little butts on the ground......LOL