Earlier this week a spilt a small amount of water (maybe 50ml) on my MacBook Pro 2019 (with TouchBar). It wouldn't turn on. Took it straight to a guy I know who got it to turn on and everything is now perfect apart from the power button.... It doesn't work. The Touch ID functionality works but I cannot use the button to turn my Mac on and off. For the moment I can wake it up from sleep with the keyboard but I am terrified that the Mac will switch off/run out of charge and I won't be able to get it back on again... What can I do? My MacBook is not under warranty.