Do never use any mineral added to the cleaning fluid (isopropylic alcohol or distilled/demineralised water: NO RESIDUE is the key). Any mineral powder or basically any dirt will become conductive when humid (and attract humidity=hygroscopic) and wreak havoc with electronics operation. @mariegirol the backing soda is probably what's causing the problem, use the same procedure as described above with isopropylic alcohol or distilled/demineralised water ONLY.

The key is the conductivity and chemical aggressivity of the liquid, not the pH. So salt water is the worst (with bleach maybe), combined with the fact that electrolysis of saltwater produces gaseous chlorine or hydrochloric acid, which are highly corrosive to metal.

Absolute priority is to switch off the power, AC power for security purposes, and also DC because DC will degrade your device by electrolysis of random parts of it (and there is also DC in each and every device nowadays). So, REMOVE THE BATTERY!

Electrolytic corrosion also happens to un-powered devices, but it is a much slower process (days vs minutes).

During disassembly of the device, take pics of the steps and keep keep track of fasteners (and send pics to iFixit later!). I know, it is an emergency situation, but taking a couple additional minutes for saving your device, if it has already been 10-15min in the water, to know how to remount the device is worth it: when power is disconnected, the degradation is much slower anyway.

A good video https://www.youtube.com/watch?v=wukul3jR... (not me)

Apparently screws are T10 not T9. T9 driver/bit works, but you'll slightly damage the screw. I use a T10 now.

Apparently the screws are T10 not T9. T9 works but you'll slightly damage the screw.

Update: the computer works even without this feature. Of course the led battery indicator does not work, but it is not a big loss.

It is advised to tape this connectors out of the way of the mainboard. Use paper tape or paper labels as you want to avoid the electrical discharge associated with peeling off of plastic tape.

It is advised to tape this connectors out of the way of the mainboard. Use paper tape or paper labels as you want to avoid the electrical discharge associated with peeling off of plastic tape.

It is advised to tape this connectors out of the way of the mainboard. Use paper tape or paper labels as you want to avoid the electrical discharge associated with peeling off of plastic tape.

It is advised to tape all those connectors out of the way of the mainboard. Use paper tape or paper labels as you want to avoid the electrical discharge associated with peeling off of plastic tape.