Skipping/ wining from stock stero
I have a Stock cd player in my 2000 GT, and it skips and ultimately ruins cds somehow, and has a loud wine, such as when you turn on a tv and can hear it starting up, just that electric wine, but this is really loud, and annoying. How can i clean out my cd player? i tryed a cleaning disk and it did not work. What else can I do? Also if i wanted to add an aftermarket changer, how would i go about that, connecting it to the stock stero?