Customer called about burnt up wires in the front second floor bedroom above the garage. Found all outlets were backstabbed and all switches were backstabbed and not grounded. Replaced all switches and outlets along that circuit. Grounded all switches on that circuit as well. Restored power and all working fine. Highly recommend replacing the rest of the switches and outlets throughout the home to avoid any further issues. Left options for replacing the original smoke detectors, performing a whole home redevice, installing AFCI breakers and installing a whole home surge protector.