What to do if my MacBook Pro has water damage?

With no idea which MacBook your sister damaged, we can't tell you what to do. If it's a very old MacBook, I'd probably not waste money on fixing it and put the money towards a new MacBook. But if it's a recent modern MacBook it could be worth having it fixed.

See this link about repairing Mac --> Mac Repair - Official Apple Support

jeadon Said:

"What to do!: My sister spilt tea with honey on her Mac book!…. Is it worth it getting fixed or buy a new one or get it fixed?"

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Recover your Data:

Start with data recovery. Retailers offer this service. They'd send it out to a Lab. It'd likely be in the thousands. So, you might as well get a new Mac. If you never backed up your Mac, then take this as a learning experience, knowing to always back up your Mac every-so-often. That way, you can have something to restore your data from should anything go wrong, such as a spill.

jeadon wrote:

My sister spilt tea with honey on her Mac book!…. Is it worth it getting fixed or buy a new one or get it fixed?

[Re-Titled by Moderator]

If you have AppleCare+ it will cover a large portion of accidental liquid damage.

AppleCare Products - Mac - Apple

jeadon wrote:

It’s a mac book pro

MacBook Pros have been in continuous since early 2006 in a number of variants with different designs and vulnerabilities. That is why lobsterghost1 said "...no idea which Macbook Pro your sister damaged?"

As too many spilled-upon notebook computers never recovery, it is important to put your homeowners'/renters" insure carrier on notice of a potential total loss. Most polices cover damage to your tech, and that may be the only financial relief your sister gets in buying a new computer.

You have the perfect storm of spill contents for a total loss:

tea — acidic. Can corrode vital electrical contacts.

honey — pure sugar. Once dry it is hygroscopic and will absorb moisture to help the tea corrode.

Be prepared for bad news

I see nothing you can do at home to remedy this, so yo must get Apple or an Apple Authorized Service Provider to evaluate

Have the Genius Bar give you an estimate for the repair. Once you have that, you can make the decision of going for it or getting a new one.

OK.......it still needs to be seen by the Genius Bar at your Apple Store or Apple Authorized Service Provider.