Okay, if that same issue is persisting even after all the reset steps, then we've got a faulty/failing digitizer.
That is the layer over the screen that senses touch.
This is something that would require repairs to correct.
In that event, your best recourse will be to contact Amazon kindle service directly, at 866\321\8851. Even if past the warranty, Amazon usually has very good customer service, and will often offer a credit/trade in toward a new or refurbished kindle model.
When you receive your replacement kindle, once it is registered and connected to wifi, all of your existing books/purchases will sync to the new kindle, so you won’t lose any of the content you’ve previously purchased.
You can of course pursue repairs on your own as well. It is about a $30 part, if you are handy with electronics repairs and up for doing it yourself. Otherwise, total repairs at a local repair shop (usually a cell phone or laptop shop) will be in the $75 range. At that point, you're generally better off buying a new kindle with a fresh warranty for not much more.
If you'd like help with parts, repair shops, or replacement suggestions instead, just let me know.
Best regards, ***** ***** for the news,