In order for capillaries to be effective, they must be properly maintained. Capillary maintenance includes storing the ends of the capillary in water or buffer. If the capillary inlet and outlet dry out, then urea or other salts from the buffer will form crystals. Because the capillary openings are so narrow even a very small crystal or particle from a solution can cause the capillary to clog. The best indicator of a clogged capillary is low current or no current when a voltage is placed across the capillary. The end of capillaries should be stored in deionized water when not in use for long periods of time.
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This book discusses the futility of curing stammering by common means. It traces various attempts at curing stammering in the past and how wasteful these attempt were, until he discovered a simple program to cure it. The book presents the life of Benjamin Nathaniel Bogue and his struggles with the handicap. Bogue devotes a great deal of text to explain the handicap of stammering, its effects on the body and psychology of the sufferer, and its cure.