Ok so I'm at my grandmothers house right now, and it's a really old house. I brought a charger (not an official apple one) and plugged it into a wall outlet. After a few seconds I can feel the sides of it kinda vibrating, and when I hold it to my ear and rub it, I hear a little static type sound. The charger is fine, as it works in my own house, and my iPod touch does not seem to make the noise. Would you advise charging in his house? I tried a few different outlets and they all seem to be the same and I'm running out of juice