Spilled tea over laptop keyboard – some keys are not working anymore

This morning I spilled plain tea (no sugar/milk) over my laptop keyboard. I dried it but now some of the keys are not working anymore – primarily shift (left side), ctrl, CAPS Lock and a few letters.
What can I do to fix this problem? Sitting with several project deadlines so I don’t have the time to run around buying a new one. Apart from that I prefer to fix it rather than spending money unnecessarily.

Thanks for any suggestions