Allowing proper contact time when disinfecting a pedicure basin matters because:

When disinfecting a pedicure basin, the disinfectant must remain in contact with the surfaces (and circulate through jets/lines for jetted basins) for the full labeled contact time to actually kill the pathogens it claims to destroy. Rushing the process or rinsing too soon leaves the basin inadequately disinfected, which has been linked to client skin infections. Respecting contact time in basin disinfection applies the same principle taught for tools and is a heavily emphasized pedicure-sanitation point on the exam.