By 1887 Lister had abandoned the spray after concluding that contamination from hands, dressings, instruments, and patient skin mattered more than organisms falling from the air. Surgical practice increasingly moved toward asepsis: preventing microbes from entering the field through sterilisation, gowns, gloves, controlled spaces, and prepared materials.
Abandonment does not mean the earlier device was irrational. It records changing causal knowledge and practical testing within an evolving antiseptic system. Medical technologies often disappear because the problem is redefined, not simply because a newer machine performs the same task better.
Museum provenance also matters. The object entered Sir Henry Wellcome's historical collection before reaching the Science Museum. Cataloguing it as “used by Joseph Lister” concentrates attention on a famous owner, while its maker David Marr and the unidentified workers who operated, cleaned, and endured it become easier to overlook.