After the second strike, the outer and inner surfaces of each arm are wiped, taking care to include the hands and spaces between the fingers.
The required act is wiping the full designated area, not washing it with water.
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How the Arms Are Wiped
Tayammum: Valid Reasons, Conditions, and Method
After the second strike, the outer and inner surfaces of each arm are wiped, taking care to include the hands and spaces between the fingers.
The required act is wiping the full designated area, not washing it with water.