I've had the EVO since launch. My original phone was working great, but a few months ago it stopped charging. Sprint gave me a refurbished EVO to replace my defective one. It worked great for a while, but the last few days the touch screen does not seem to respond well. The bottom and left side are worse. It does not happen all the time, but it happens enough that it is irritating. Has anyone else had this issue? Can I take it back to Sprint and have them replace it? I hate having to drop off my phone with them for hours to "diagnose". Thanks for any advice/info!