Your phone isn't charging correctly. Inside the port, you can see corrosion on the connectors. Which of the following is the BEST solution?

Corrosion can limit or prevent a phone's charger port and cable from connecting, but you don't have to replace the port or the phone. When cleaning corrosion, do with caution. Because it dries fast, isopropyl alcohol is used to clean. Make sure the phone is turned off, and remove the battery if it is supposed to be removed. Be delicate and use as little liquid as possible with a lint-free cleaning swab. Never wipe the phone's power port with a toothbrush.