What are the common issues associated with heating coils in dryers and how can they be effectively maintained to ensure optimal performance?

Common issues associated with heating coils in dryers include overheating, burning out, and becoming coated with lint or debris. To maintain optimal performance, regularly clean the coils to prevent lint buildup, ensure proper ventilation around the dryer, and avoid overloading the machine. Additionally, schedule professional maintenance checks to identify and address any potential issues early on.