Reason for today’s visit was the troubleshoot power loss to the first floor bedroom and foyer lights. After my assessment I found that the devices in the first floor bedroom were all speed wired or backstabbed which caused weak connections and caused one of the devices to melt. After pulling out several of the other devices I found that many of the other ones were showing discoloration due to melting. I checked several other devices And found that the rest of the floor was all wired properly. My recommendation was to replace all the backstab devices on the circuit. Customer went ahead with the replace work and had all seven outlets in the bedroom replaced. The arc fault breaker which protected/controlled this circuit was already replaced with a new duel function style BR breaker. Once work was completed we test it out devices and lights on the circuit and everything checked out properly. We also made a quote to replace all the smoke detectors and carbon monoxide detectors in the home.