Maintenance Method Of 3.5MM Plug Audio Connector

No matter what kind of plug, a long time without use will make its surface oxidation, resulting in poor contact. Therefore, if you do not use 3.5MM Plug Audio Connector for a long time, it should be protected. Many audio I/O devices come with a plug sleeve at the time of purchase, so that's the best protection. If the 3.5MM Plug Audio Connector has oxidized, the following method can be used (the above method is best, the following method is worst)
1, with dilute hydrochloric acid, very dilute can, with a cup of water, with a glass stick stick concentrated hydrochloric acid, to the water (when the operation should be careful, don't throw all over the world, and must stay away from concentrated hydrochloric acid bottle mouth), more than a few times, and then the whole plug into the bubble, stir and stir for a long time no matter, because silver and copper and hydrochloric acid will not react, and then take out dry
2, with toothpaste gently wipe, gently wipe, rub more. Force may scratch the coating, scratch will also be poor contact
3, with cardboard wipe, do not follow the grain, but also gently wipe
4, use eraser, this should be hard, but not very good to wipe, some places may not wipe
5, sandpaper, fine sandpaper better, coarse sandpaper is dead, it is best not to use this method.