I'm feeling hopeful about this now--Thank you so much for taking the time to read and reply.

deli & Christina, that was a good and useful article. Vinegar sounds like a good idea as well as Febreeze, Rhapsody. Even if the Febreeze doesn't remove the source, it will sure help during the process of getting rid of the source.

I talked to my sister who suggested amonia with lemon, especially to clean the window screens. The patio screen was full of holes & rips so I'm making them replace that; apparently they had a dog too from the height of those areas of damage. But luckily I don't smell any animal smell. I have a cat and I never have animal smell thanks to scooping the litter box every day and discovering the Indoor variety of Science Diet cat food--$$$!!, but it nearly eliminates litter box odor.

Wow, I feel so much better now that I have a plan and options and it looks like it might be possible to eliminate this old closed up smokey smell. Luckily it is not blistering hot here yet so I can open it up some too.

Thank you all again