Kohler K-8501 Guide De Propriétaire page 6

Reduced Flow - Family Spray
With water running through the showerhead, firmly rub your
finger back and forth across the spray holes in the face of the
showerhead to dislodge debris and mineral build-up. This may be
all that is needed.
With the water turned off, insert the showerhead tool (provided)
into the holes on the face of the showerhead. Firmly turn the tool
counterclockwise to loosen the spray housing.
Remove the spray housing from the showerhead. Inspect the
spray housing for debris or mineral build-up, and clean or
replace as needed.
Carefully thread the spray housing into the showerhead with the
showerhead tool.
If this fails to improve the performance of the product, proceed to
the Screen Washer section.
1016116-5-AE
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Spray Housing
Showerhead
Tool
6 Kohler Co.