finger trouble
 n.— «Customers contacting the Helpline do so for a variety of reasons. Perhaps they don’t understand the remote control, the instruction book or are having problems caused by “finger trouble.” We will—using Sanyo products and manuals—talk them through the process and try to resolve the problem.» —“Technical helpline support for Sanyo customers” Domestic & General Group Apr., 2004. (source: Double-Tongued Dictionary)

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