battery -30C cant charge it

somehow water (i dont even know how) got into the inside of the phone and there were some droplets on the battery. and now i cant charge the phone because it says the battery is too cold, everything else works but i just cant charge the phone. i installed an app and it shows that the battery has -30C temperature and everytime i plug in the charger the diod is red and the warning shows up. how do i fix that? or how do i disable this safety mechanism in the phone so it wont pay attention to my battery temperature