HELLO!!!! i made a short video in  the sea with my bv9600 ( 10 cm deep and 55 sec long) imidiatly after i take out the phone from the sea i wash it with fresh wather ( from a bottle) and evrithing it was ok but after 4-5 hours the problem start : the fingerprint senzor it was VERRY HOT and the battery life it was going down verry fast, first of all i restart the phone : same problem , i make a factory resset : same problem , i made a hard reset and when i go in the settings to dissable the fingerprint option it DISSAPEAR it is no longer in settings..and the senzor it is all the time warm, if i lock the screen is satrt to cold down if i unlockit start to be warm and is eating the battery faster. I speak with the shop from where i buy it and they told me that the phone is not whather proof in the sea ( this it is a bullshit) and i send the phone to them to check it and to see if it is my fault . Any advice. Thank You

Water has entered the phone inside. Please do not use the phone these days and disassemble the phone and place the inside components under the sun for 2days。 Then try it again. If not work means you should repair the phone.