Never press the keys of the calculator with a ballpoint

pen or other pointed object.

  Use a soft, dry cloth to clean the exterior of the

calculator.

If the calculator becomes very dirty, wipe it off with a cloth

moistened in a weak solution of water and a mild neutral

household detergent. Wring out all excess liquid before

wiping the calculator. Never use thinner, benzene or other

volatile agents to clean the calculator. Doing so can

remove printed markings and can damage the case.

E 6