Dead Kindles

My bad luck with Kindles continues and I'm now on my 4th in as many weeks. The first one did last a yeaar and a half befor the screen saver partially froze with weird lines over the screen. The replacement lasted 3 days before the same thing happened and the next one lasted 2 days :( Amazon have advised it's just really bad luck. I'll wait and see how long the next replacement lasts.