My son spilled soda into 13"MB early 2011, I did not get to repair for 6 weeks. Machine took over twice typical time to start-up and once running, cursor showed stuttered movement and launching applications was very slow.

I used guide (only steps 1-19) to remove logic board and delicately cleaned with very slightly damp Q-Tip (using Windex electronics cleaner) & dried, every place I cleaned, using compressed air. I did not remove the heatsink, as I assumed the paste protected the processor underneath.

Once cleaned, I reversed all steps and it booted quickly and all other issues disappeared. THANK YOU!!!