腐食したり変色したりしたコンタクトはどうすればよいですか？

金は腐食しないが、その下の金属は腐食するかもしれない。.

• Do Not Sand: Never use sandpaper or steel wool on gold-plated pins! You will strip the plating off entirely.
• Mild Abrasive: For stubborn tarnish, you can use a very fine Scotch-Brite pad or a pencil eraser very gently, then clean with alcohol.
• 予防だ： Green corrosion usually means the connector was unmated while wet. Always rinse and dry before storage.