UPDATE.......the source has been found. A lost storage of a few flour bags and one wheat flour bag was back behind the pots and pans in a cabinet. Looks like they had been working on the bags awhile, but I never saw a single one until about two weeks ago. The flour was actually forgotten and could be as old as 4-5 years.
It was removed obviously, and I sprayed everything everywhere yesterday. I have not seen a single one since. I'm sure there may be a few stragglers here and there, but the source is gone.......I really appreciate the help on this....I would have never figured out to look for flour. Learn something new everyday.
Thanks again guys.