tethered jailbroken iPhone 3GS won't turn on, help!

[EAA]

Hello. About a month ago I briefly got my iphone wet, long enough for it to turn off on its own. I put the iphone in rice for about a week. I plugged it into the pc and the only thing that shows on the screen is that I have plugged it into a power source. It shows a very low battery. When i unplug the iphone, it shows the picture of a plug and an arrow pointing to the lightning bolt. No matter how long it is plugged in to a power source, it will not seem to charge because it stays on the red, low battery icon. Sometimes (haven't figured out exactly what causes it) it will go to the apple logo icon and just stay there. I changed the battery, and it does the same things. When I try to boot it up, using ibooty, irem, or redsnow, it says it cannot detect device and/or failed to enter into dfu. iTunes nor windows will detect the iphone, but the phone knows when i unplug it because it says to plug it back in to charge, which it doesnt seem to do. I know nothing is wrong with the usb because itunes and windows recognizes my ipod. Any suggestions would be greatly appreciated!