Original sentence: The potentiometer is a satisfactory way for non critical applications such as volume control on a radio, but as it has a wiper contact rubbing against a resistance element, dirt and wear between the wiper and the resistor can cause erratic readings
Edited sentence: Dirt and wear between the wiper and the resistor can cause erratic readings.The potentiometer is a satisfactory way for non critical applications such as volume control on a radio, but as it has a wiper contact rubbing against a resistance element