Did you disconnect it right after you spilled soda on it? If you did, then good for you. One less problem.
There are many ways against spills and these forums are full of stories with them, but to sum it up, you have two choices.
1) Open it up and desolder the switches, clean them up, or get new switches, and solder them again. I stopped using my BW and I never bothered opening it so maybe someone who opened a BW can help. If you open a BW you lose the RMA, but you spilled something on it so the RMA doesn't cover that.
2) Disconnect the keyboard, put the keyboard upside down, and pour distilled water into the affected switch and blow it with canned air. It's better if you can do it with the keyboard upside down so that the water with sugar has less risks of going into the PCB. Do it a few times, make sure you get all the sugar out. You might need to let it dry a few times and try again, and you'll start noticing the improvement. Give it at least 3 or 4 days to dry outside (if you can wrap with newspaper it also helps) before you plug it back in (that way you're sure there's no moist inside). However, unless you get extremely lucky, the switch will never be the same, different sound, different feel. If you don't mind about that, then you're good, otherwise try option 1 or buy a new keyboard. Lubricant on the switch also works to get the old feel again.
The BW is a great gateway to the mech keyboard world. There's a million better keyboards than the BW that you can try out, so if you don't care about money, there's quite a few threads that you can read to take your next step into the mech keyboard experience.
P.S: For option 2, it has to be distilled water yes or yes. You may try with isopropyl alcohol but I never had any experience with it. Pro Tip: Don't bother trying WD-40 or putting your keyboard in the dishwasher. Might as well just turn your keyboard on fire and start a ritual.
