A small pocket calculator comes in handy in a workshop, and some woodworkers rely on one constantly. However, wood dust, moisture, and liquid spills can play havoc with a calculator's delicate workings.

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Place the calculator inside a clear, resealable sandwich bag and keep it there. You can still easily operate the calculator and read its display without worrying about damage from dust, debris, or fluids.
—R. C. Proffitt, Oak Harbor, Wash.