The best way to do is to first make sure that the water gets completely dried up from withing the device before you attempt to power it on. Attempting to power it on while there is still present moisture within will only cause more harm. Do not even leave the battery installed prior to its getting fully dried up. Depending on the extent to which it got wet, you may need to open it up and rinse it thoroghly with Spirits. Leaving it plunged in rice on silica for some time can help get it fully dried up.