If the plastic on a cord has melted, it is not safe to continue using it. Melted plastic on an electrical cord can expose the wires, leading to potential electrical hazards such as short circuits, electrical shocks, or even fires. Using a damaged cord can be extremely dangerous and poses a significant risk to your safety.
It is crucial to replace the damaged cord with a new one or have it repaired by a qualified professional. Unplug the toaster immediately and avoid using it until the cord is fixed or replaced. Electrical repairs should always be handled by trained individuals to ensure safety and prevent any further damage or accidents.
Remember, safety should always be the top priority when dealing with electrical appliances and cords.