I cleaned up mine (4s) following the ifixit guideline for the wet phone (3s) and i replaced with a new battery that i got from ifixit, but now i can not get rid of the apple logo, it just sits there and can't boot the phone. I tried holding both buttons and do hard reset but it wouldn't work. I tried with itunes, it asked me to recover it but i can't afford to lose the data, 1 year worth of pictures, videos and audios of my 4-year old. So i'd do anything before i assume its gone...please help...
(tried ifunbox and PhoneView but they can not recognize the phone yet)