I hate how apple calls their employees "genius"es. A squirrel knows more about apple products than these idiots. They're the car salesmen of the tech world.
I had a Nano whose battery didn't charge properly. All they did was try to reset it. They didn't want to plug it in, and I had to actually do it in front of them, and their diagnosis was that "it doesn't charge properly". Thanks Einstein.
It was still under warranty, but the only thing these idiots are geniuses of is trying to upsell you applecare. They'd only replace one if I purchased it, which was BS and had to get a manager to sort it all out.
My suggestion is to educate yourself and avoid the apple store at all costs, and know how the warranty program works. You don't need apple care for everything!