My wired headphones were stored in a purse next to a small tub of petroleum jelly, and the cap came off. The USB-C plug ended up in the jelly. I removed the visible residue with tissue and a cotton swab, but I suspect some remains inside the connector. The headphones still might work, but I don't want to risk contaminating or damaging my phone or laptop's USB-C port. What is the safest way to clean and test the plug?
2 Answers
Use an electronics contact cleaner if you already have one, provided the label says it is safe for plastics and leaves no residue. Wear eye protection, use it in a ventilated area, and wait until everything is completely dry before plugging the headphones in.
A little gentle warmth can make the jelly less viscous and easier to remove, but don’t overheat the connector. A hair dryer on a low setting for a short time, with the plug facing downward, is enough. Follow that with an alcohol cleaning and allow it to dry fully.
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