Slide on a pair of work gloves to protect your skin. Shut down power to the well prior to removal of the well cap. Unlatch and pry open the well cap with a screwdriver.
Attach a handle strap to a poly-fiber bristle well scrub brush with an extended handle. Slide the handle strap around your wrist to ensure you hold onto the brush while you scrub.
Insert the brush into the well. Move the well scrub brush up and down with medium to firm pressure. Continue up and down the entire length of the PVC casing.
Remove the brush from the well. Rinse the brush with clean water.
Wrap a terry cloth fabric around the bristles of the brush. Secure the upper edges of the terry cloth to the brush handle with electrical tape.
Insert the brush all the way back down into the well casing. Move the brush up and down with medium pressure to swab the PVC casing. Remove the brush and discard the terry cloth. Reattach the well cap.