How to clean the tip parts of the lighter?

The tips are made of heat resistance ceramics ( the ceramics do not burn）. But carbon from candle soot and charring wax produced by candle burn when lighter literally jamming it into the wick . You can clean the tip parts of lighter with soft cloth .

What are the precautions for charging the lighter?

Don’t use a fast charger to charge the lighter. These fast chargers have built-in chips to control power, which may be vulnerable to hacking attacks that can cause power surges in the charger, which may damage normal electric devices.

Is the rechargeable lighter safe to use to light gas stove?

Yes, it can be used for light gas stove. And for the safety of consumer, the igniting spark will auto stop beyond 10 seconds per igniting.

Is this easy to light? My mom doesn’t have the strength to use a traditional candle lighter.

Yes, it is easy to light. All you have to do is press the little power button that is on it and then hold it to the wick. The candle will be light in seconds.

Does this electric arc lighter come with USB charging cable and what type of charging cable?

Yes, it comes with a charging cable. You can use the USB port to charge it through computer. If it is missing, you can use a mobile phone charging cable. They are the same kind of charging cable.