Why do my iphone chargers always break?

It's always the USB part that breaks.
After a while, it only charges when it is at a certain position and then eventually it completely stops working. Over the last 6 months I have gone through 2 chargers, both with the same problem

My dad has had his for 2 years and never had a problem so does anyone know what I'm doing wrong?

I charge it once a day and my little brother uses it every seconds day to charge his iPod

Because they're cheaply made and overpriced.

I never have an issue with mine. My guess is people are abusing them by just yanking the chord when they unplug it.

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