What material is used to clean the audio connector pins on a radio and handset?

The use of a rubber eraser to clean the audio connector pins on a radio and handset is correct because it is non-abrasive and effective at removing oxidation and dirt buildup without damaging the metal contacts. Rubber erasers gently dislodge debris while also helping to restore conductivity, which is essential for maintaining clear audio transmission.

This method is preferred because it minimizes the risk of scratching or otherwise compromising the integrity of the connector pins. Additionally, rubber erasers are readily available and easy to use, making them a practical choice for routine maintenance in communication equipment. This helps ensure the continued proper function of the radio and maintains communication reliability in the field.

Other cleaning materials like sandpaper, cloth, or steel wool could cause harm: sandpaper could scrape and damage the pins, while steel wool could leave behind metal fibers that might cause short circuits. A cloth might not effectively remove oxidation or persistent buildup, and using any abrasive materials or inappropriate substances could result in long-term damage to sensitive components.