Its probably a little late now but you turn the keyboard upside down to let as much drip out as possible and to hopefully keep the liquid from running too far in. Sugar can fry the keyboard at which point I think you have to by a new one. But if it functions and it's just sticky, you can pry off the keys and use a cotton swab with rubbing alcohol. This is the way to get the grease and dirt off of the keys themselves. Good luck!
Get a piece of cloth or material to clean the keyboard with, apply a small amount of warm water to the keyboard and apply light force, enough for the keys to depress. The sticky substance will soon disappear.
You can try to use a warm slightly damp cloth and wipe the keyboard gently but getting as much of the coffee off as possible. Then turn the laptop over and lay on a towel to catch any excess liquid. If the keyboard becomes too sticky and the keys do not work any longer, you can order a replacement keyboard and find instructions about how to replace the keyboard online. If you are not comfortable with making the repair yourself, you can hire a local computer tech to do the job. On your own $20-$40. Pay someone to repair $75 and up.
To turn off sticky keys on Windows, go to Settings > Ease of Access > Keyboard, then toggle off the Sticky Keys switch. If you're using a Mac, go to System Preferences > Accessibility > Keyboard > Sticky Keys, then uncheck the Enable Sticky Keys option.
You have a horrible sticky mess to clear up
Use a solvent.
It is almost certainly a keyboard malfunction. Either the internal traces have been damaged, or the keys have become sticky and are pulling down neighboring keys with them.
reinforcing tabs
tape
stop jizzing on your keyboard?
by sticking it together with sticky tape or get it fixed at JB HI FI
eyes
To turn Sticky Keys on or off... go to: Start > Control Panel > Ease of Access > Change how your Keyboard works > click the tick box next to 'Turn on sticky keys' > click 'Apply' > click OK, and you're done. Repeat the process if you want the sticky keys back on.
Despite Urban mythes, soda doesn't take off significant amounts of rust. Stronger acids can remove oxide faster and more effectively, but the danger is greater. Not only that, but soda gets sticky after spilling it over something and strong...my-buzz.com for more info.