To Fuze Glowbes, you must first have at least 2 Glowbes on your Island. Tap on the first Glowbe you want in the combination and then tap on the 'Fuze' button. Repeat with the second Glowbe. Finally, tap on the 'Fuze' button in the Fuzer menu. You lose the Glowbes during the Fuzing process, but you gain a new Glowbe that combines the colors of the originals. Experiment with different color combinations to create a wide spectrum of Glowbes.