Sharper Image SI867 - Manual (Page 6)

The collection grid has many edges and areas that can trap
water. Ensure the grid is completely dry before re-inserting it into
the unit. If it is not completely dry, the unit could be damaged.
If water is used to clean the grid, allow at least 24 hours for the
collection grid to dry.
This unit should not be located near a fireplace, whether or not
the fireplace is actually in operation. Dust and soot from the
chimney could be rapidly drawn through the air purifier and
deposited on or around the unit.
In any area where this product is subjected to heavy pollution
or smoke, it will be necessary to clean the collection grid
more frequently.
If the unit begins to arc or make a “static-like” sound, turn the
unit off, slide the collection grid out and slowly invert the unit
several times. Replace the grid.
Important Information – Please Read
6