finger trouble
n.β Β«Customers contacting the Helpline do so for a variety of reasons. Perhaps they donβt understand the remote control, the instruction book or are having problems caused by “finger trouble.” We willβusing Sanyo products and manualsβtalk them through the process and try to resolve the problem.Β» ββTechnical helpline support for Sanyo customers” Domestic & General Group Apr., 2004. (source: Double-Tongued Dictionary)