21.   Kesko and Tuko stores sell food and consumer products, such as toiletries and cleaning agents.

22.   Mahdessian, who was born in Queens, is a fast talker who can explain precisely the chemical actions of a wide variety of cleaning agents.

23.   Most brush units have reservoirs for cleaning agents, but first try scrubbing the walls with plain water.

24.   Place a drop of the cleaning agent on the tip of a cotton swab and carefully apply it to the corner of the photograph.

25.   Read the cleaning agent packages carefully for instructions and precautions.

26.   Pressure washers also have a reservoir for cleaning agents but in most cases power spraying with clear water will be enough.

27.   Stubborn stains may require a stronger cleaning agent.

28.   The electrolysis technique was adapted from a process developed by another Sanyo division to clean swimming pool water without cleaning agents.

29.   The station was shut down for six hours until investigators determined the liquid was a cleaning agent.

30.   These are strong cleaning agents, so test them in an inconspicuous spot and avoid using them in concentrated strengths.