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Mechanistic information about how gaseous ions are formed from charged droplets has been difficult to establish because direct observation of nanodrops in a size range relevant to gaseous macromolecular ion formation by optical or traditional mass spectrometry methods is challenging owing to their small size and heterogeneity. Here, the mass and charge of individual aqueous nanodrops between 1-10 MDa (15-32 nm diameter) with ∼50-300 charges are dynamically monitored for 1 s using charge detection mass spectrometry. Discrete losses of mi