Cleaning a live or "hot" power line is a specialized task that requires precise equipment and demineralized water. The most common methods are:

• Truck-Mounted Hot Line Washing: A dedicated truck with a demineralized water tank, high-pressure pump, and a hydraulically-actuated boom is used to spray the insulators.

• Helicopter Insulator Washing: For remote or hard-to-access areas, a helicopter equipped with a belly-mounted water tank and a non-conductive washing boom provides a fast and efficient solution.