This task is usually performed twice per year to provide clean, streak-free exterior and interior glass.  In recent years, smoking has been prohibited within office buildings and because of this the frequency of cleaning interior glass can often be reduced to one time per year or “as needed”.

There are two basic methods of squeegeeing solution from glass.  The first method is called the "straight" method.  It is done with simple straight-line movements and is a common method used by novice window cleaners.  There are many times when the straight method is the only feasible method.  It is typically used on narrow windows/glass.  The "fanning" method is utilized on large, unobstructed window areas.  It is faster than the "straight" method.

Window and Glass Cleaning Procedures, Straight Method

•  Begin at the top left-hand corner of the window/glass with the squeegee blade held perpendicular to the ground and tilted at an angle so about two inches of rubber touches the glass at the very top.  Using the squeegee blade tilted at this angle is called "cutting the edge." Draw the tilted squeegee along the top edge of the glass to the top right-hand corner. Remove the squeegee and wipe the blade with a chamois or sponge.

•  Once again, “cut the edge.”  Start at the top of the three-inch strip (with the squeegee blade held parallel to the ground and the left two inches of the squeegees blade touching the glass) and draw down along the left edge of the window to the bottom.  Wipe the squeegee blade with the chamois and start from the now dry surface at the bottom left-hand corner.  Hold the squeegee perpendicular to the ground and draw it across the bottom of the window/glass.

•  Use the chamois cloth to wipe any remaining solution and soil from the corners or framework to complete the job.

Window and Glass Cleaning Procedures, Fanning Method

•  Begin with the same first three steps as with the "straight" method.

•  Starting from the top right corner, draw the squeegee along the right edge of the window to within three inches of the bottom. This time, the left end of the squeegee blade should be higher than the right end so that the water runs off the left end onto the part of the window that still needs to be squeegeed.

•  Next, begin on either the upper left or right side (it doesn't matter which side, since both are now dry) and move the squeegee back and forth across the glass from side to side in one continuous motion working down to the bottom strip.  The top of the squeegee blade should be angled farther forward in the direction it is headed than toward the bottom of the squeegee blade.  This will ensure that the solution flows off of the squeegee blade and onto the unsqueegeed area.

•  If any tape or residue remains on the window/glass after coverage by the strip washer,

use the razor scraper blade to remove it.  Always use a slicing motion to remove tape, drawing the blade across at an angle.  This will prevent the glass from becoming scratched or chipping the razor blade.