Turn off your laptop,
turn it on again and before you here the original booting up sound hold 'R' and 'P' and 'Command' + 'alt' until you here the booting up sound three times then release. this might help you.
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If not clean your pad and put rice on your pad, this absorbs the moisture
Let the rice sit for 4 or 5 hours, both ways helped me if not take to apple store