A recent PCCP cover communication throws light on a recombination of protons and NO₃^- anion in water clusters. The simulations by R.B. Gerber and Yifat Miller used directly high level ab initio methods (MP2) in the dynamics. The lifetime of the ions is found to be of the order of 1 picosecond. Both H₃O ⁺ and H₅O₂⁺ appear in the course of the process, but the neutralization process always involves H₃O⁺ and not H₅O₂⁺.