Turn off the dryer, and open the door.
Pull out the lint filter from inside the door. You will find it either at the top or at the bottom of the door.
Dampen your fingers with water, and roll the lint off the filter. Roll the lint downward, and work across the filter to remove all of the lint. Throw the lint away.
Rinse the filter under warm running water.
Apply two drops of mild soap or dish detergent to a soft brush, and scrub the filter on both sides.
Rinse the filter with warm water to remove any soap residue. Shake off excess water, and dry the filter with a towel.
Slide the filter into place in the lint filter compartment.