What do cell culture, cooking beans, and soft water all have in common? You just gotta get rid of those pesky calcium and magnesium ions. To transfer cells to a new container, use EDTA to CHELATE IT OUT! To soften those bean skins and prevent the beans from exploding, use salt to ION EXCHANGE IT OUT! To keep your shampoo properly beautifying those tresses, DOUBLE-WHAMMY IT OUT!