1.   Women sometimes damage their skin by going overboard with abrasive cleansers.

2.   A. Cast-iron tubs will last indefinitely, but the porcelain enamel surface does not, especially under decades of scrubbing with abrasive cleansers containing fine sand or pumice.

3.   Do not use abrasive cleansers in or on the keyboard, or liquids that will drip into the keys and perhaps damage the underlying circuitry.

4.   Scrubbing the skin too hard or using an abrasive cleanser can also be a problem.