Fed up with my Sprint Touch.

[ObsoleteE]

I have 6 months left on my contract, but I don't know if I can stand this phone for that long. I am looking for some help with a few issues I have been having.

About 50 percent of the time I charge my phone, the charging icon will appear, but when I wake up in the morning, the phone is near dead and shuts the phone option off. If I restart the phone, this seems to temporarily fix the problem. I was told that I could get it replaced by Sprint for free, but there is an issue with that as well. The water damage marker is in the worst possible spot on this phone. The marker indicates water damage, and has for over a year, yet my issues are new. It probably happened on a hot day and sweat got onto the marker. Could I argue poor placement to Sprint, and get a replacement phone? Any info would be greatly appreciated. If I am stuck with this phone, its going to be a long 6 months. I've attached a pic that shows the poor placement of the water damage marker.