1Place cheeses and flour in resealable plastic bag. Shake until cheese is coated. Rub garlic on bottom and side of fondue pot; discard garlic. Add wine. Heat over simmer setting just until bubbles rise to surface (do not boil); stir in lemon juice.
2Gradually add cheese mixture, about 1/2 cup at a time, stirring constantly with wooden spoon over low heat, until cheeses are melted. Stir in kirsch. Sprinkle with chives.
3Keep warm over simmer setting. Spear Dunkers with fondue forks; dip and swirl in fondue with stirring motion.