How can I fix keys on my Dell laptop that have become harder to press?

A couple of days ago, my son spilled soda on one side of my laptop computer. Upon using it, I discovered that some of the keys in that area have become difficult to press down, they work just fine but I have to apply extra pressure and this especially affects the flow of my typing as I type quite fast, except for when I have to use those difficult keys... I'm scared of taking off these keys to clean the residue as Ill probably break them in the process. Any ideas?

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