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Bugs like to crawl into little holes like on the charging plug/car and can increase resistance enough to cause this issue.

When I built a robot that had to plug/unplug things 1000s of times it had an air-gun to clean out the plugs each cycle.

I am not sure arc-detection would help you that much in case of a bug because by the time it starts arcing the pin has already melted.

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So we should bring a can of air, when using a public charging station, and blow it clean before use?

Metrovac makes an electric plugin duster that is the bees knees. Never have to buy a can of air again. It's powerful too. Powerful enough that you feel what little torque the motor has when it powers on.

This is the model. https://www.webstaurantstore.com/metrovac-ed-500-datavac-ele...

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