LG KF75 secret moist and doesnt work

1 pull the battery and sim out and dry immediately this normally shorts out or gets hot burning up the battery and the phone also Do Not Plug Phone Into Charger Or Other Cables you are asking for trouble if you do this IT WILL SHORT OUT
2 dry out by leaving all covers off and open the phone up as much as possible
3 you can put it under a hair dryer Be Careful this can damage your phone as well don't get it too hot
and don't blow it into the phone too hard you will only push water around making problems worse in other words a gentle heat is ok don't blast with air. the best method ive found is to place in front of an air conditioner like a window unit these things will pull moisture out like a sponge without the heat in the summer this is the best method I have found and have had some success with.. do not put battery or sim in your phone until it is completely dry that means give it a day or two after trying these methods to just sit then install your sim & battery if it boots. consider yourself the luckiest person in the world water and moister even from sweat if you carry your phone in your pocket kills phones quicker than anything and very few are able to recover from it.

try opening it up drying is out properly with a hairdryer, that should help