I. The Debate Over Using Alcohol for Cleaning

The surface of a composite insulator is typically made of silicone rubber, which acts like a waterproof jacket for power lines. While alcohol evaporates quickly without leaving water spots, its solvent properties can potentially damage the protective coating of this "jacket." Experiments have shown that regular cleaning with alcohol reduces the hydrophobicity (water-repellent property) of the silicone rubber surface by 15%–20% - much like how a piece of outdoor gear loses its water resistance when its protective coating wears off.

II. Smarter Cleaning Alternatives

The following methods are gentler and more effective than using alcohol:

• Physical cleaning with a dry cloth: Use a microfiber cloth and wipe in one direction to avoid generating static electricity through circular rubbing.
• Neutral detergents: A diluted dish soap solution can remove grease without damaging the material.
• Specialized cleaners: Products containing siloxanes can clean the surface while simultaneously replenishing its protective layer.

III. Handling Specific Situations

For stubborn stains, consider the following tiered approach:

• Organic matter (e.g., bird droppings): Remove physically using a wooden scraper, then spot-clean with a wet wipe.
• Industrial grease/oil: Dab the area with a cotton swab dipped in a small amount of alcohol, then immediately blot dry with a dry cloth within 10 seconds.
• Salt spray deposits (crystallization): Rinse with distilled water, then dry quickly using a hairdryer set to the "cool" (unheated) air mode.