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(Possible) late liquid-damage symptoms

Hey everyone,

About one year ago, there was a minor liquid soda spillage incident with my MacBook Air M1 13 inch (2020). It was only a few drops but they did get under some keys. I disassembled and cleaned the affected keys carefully (following a legitimate tutorial). Functionality wise everything seemed to work out fine afterwards. Since then the keys occasionally seemed to get a little bit sticky again so I repeated the process about three times over the course of the last year. The keys are not longer sticky but the "T" and the "Enter" key started to malfunction as of lately (about three weeks ago). They sporadically repeat their characters unexpectedly. Since further cleaning hasn't helped solving the problem, I assume these are late symptoms of the possible inner liquid damage.

What I am asking is your expertise on what repair steps I should consider doing first. Is it possible that internal liquid damage can appear so "specific" only affecting two keys? If so, what part is likely to be the cause for the problem? I'm glad about any advice and look forward to hearing from you guys. Thanks a lot in advance for every response!

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It is odd that it would occur after a year, but your hypothesis seems feasible. Light liquid damage can certainly appear in such isolated form.

I suspect that the switches are shorting underneath the problematic keys as the semi-moist sugar sludge that may have accumulated in them is conducting electricity. I would recommend taking the keyboard apart and giving the problematic switches a generous serving of high-purity (>90%) isopropanol, ensuring to wipe it afterwards.

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Thanks for answering. So you are saying I should essentially repeat the process of taking apart the affected keys (externally) and clean them again (thoroughly with isopropanol)? Or did you mean to perform a complete teardown and have a look at it from the inside?

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I hate to say it, but there isn't much you can do apart from cleaning it again short of replacing the entire keyboard, which is potentially doable but not easy or cheap either.

Take the affected keys off and clean the actual switch underneath them with isopropanol as it won't damage the electronics (if used in moderation).

I apologize if you have already done it like so, I am just trying to ensure that everything that can be done has been done.

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@david56209 No worries, I appreciate your help. I have repeated the steps and as of now it seems like the issue remains. Well, I guess I‘ll have to choose between an expensive repair or an expensive entirely new one then. Thanks again.

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