Capacitor reforming is a process used to restore the performance of old or long-unused electrolytic capacitors. Over time, the dielectric layer inside these capacitors can degrade, especially if they have not been powered for extended periods. Reforming involves gradually applying increasing voltage to the capacitor, typically using a current-limiting resistor, to rebuild the oxide dielectric layer. This process helps reduce leakage current and the risk of capacitor failure, which is crucial for the reliability of electronic equipment. Capacitor reforming is commonly performed in the maintenance of vintage computers, radios, and other electronic devices to ensure safe operation.