Is there really such a thing as 'clean' foundation? This questions has actually been answered.
Even if a Beek uses their own comb, is it 'ever' clean? Compared to what? How many chemical residues are acceptable in foundation?
Nothing is as clean as the real thing, made fresh by your own bees IMO. FOUNDATIONLESS Beekeeping isn't hard and your bees will thank you
Do bees in a tree replace old comb w/clean comb? Or do they just take off to another tree when the comb becomes too contaminated?