iPod Touch 4G Charging Problems

The third-party charger that I have been using for a year stopped working. I eventually figured out it was the charger, not my PC or iPod. So I use my old Apple charger that came with my iPod which stopped working somewhere in mid 2012 early 2013 (got iPod on Christmas 2011). When my iPod dies, I plug it in with the Apple charger. It will boot up unless I touch it, even a bit, and I have to reconnect it to charge it. Then, while I'm not there, iOS boots, as usual. But, it shows a charging battery in the corner, but the lock screen has my wallpaper, not the battery. Everyonce in a while when it's plugged in, it will go from 20% to having the full charged symbol, and it's not fully charged. Everyonce in a while it also says "Charging not support with this accessory". Also erlier today when my iPod was plugged in, it made the charging sound, one after the other, four times. And nobody was there and the charger was exactly how it was left. It is starting to get really bad and I might get a new (sorry, non-Apple) device. PLEASE HELP! Thank you.