I've had iPod touch about six months, and I've tried restoring it but its still very unresponsive and slow loading videos

My iPod touch is about six months old and I use it pretty regularly. It's always had problems with the home button being unresponsive, but lately it's been loading video and Internet very slowly and sometimes the touch screen is also unresponsive. I've tried restoring it on iTunes but my iPod is still acting the same. What can I do to make it run better and how can I fix the home button (I've also tried force closing an app that came with the iPod because I hear that can help with the home button but that also did not work!)

Thanks!

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