This is unconventional, but is a proven remedy for the issue you've come across:
You'll need very little in the way of materials. A clean dry cloth, 1 gallon of distilled water, 1 one large plastic bag, and 1 large aluminum pan (about the size of a typical lasagna).
First, wipe down your laptop completely of any excess dirt or dust. You want it to be as free as you can possibly make it of any foreign dust particles.
Next, slowly pour the distilled water into the pan you've selected, making sure to do it evenly and not allow too much oxygen to mix in.
Next is the tricky part. Slowly submerge your laptop into the pan of distilled water. Make sure it is off, and the battery has been removed for at least 15 minutes prior to allowing any water to touch it (to ensure there's no latent power circulating).
Let your laptop soak for about 5 minutes. It's up to you if you'd like to keep the monitor open or closed. Some people claim that this process actually renews your screen as a side effect. Another option is to add about a tablespoon of salt. This is said to absorb any foreign particles that may be in or on your laptop, including sugar residue from the soda. I haven't personally tried this, so do so at your own risk.
After you're done soaking your laptop, immediately take it out and place it in a plastic bag. Ideally something that you can get air tight (like those large zip-lock freezer bags). One you've gotten it bagged, place it immediately into the freezer for no less that 2 hours.
While it's in the freezer, pre-heat your oven to 365 degrees. You must be precise here because any less will be ineffective, but any more may possibly cause some permanent damage. When your two hours are up, take the laptop out of the freezer, remove from the plastic bag (this is important!) and immediately into the oven, ideally directly on the rack, but you can use a cookie sheet as well providing that it's clean and there's no chocolate residue.
If you've gotten this far, then you should have your head examined. As if drinking a soda over your laptop wasn't bad enough, now you want to drown, freeze, and cook your laptop too?
