Escape key doesn't work, shift+tab and left alt+tab don't work either

So my girlfriend spilt a some vodka on my laptop the other night. Now my escape key doesn't work at all. The left shift, left alt, and tab key all work fine individually, but none of them work together. Is it possible to replace individual keys for the XPS 9700? Or does this require a full keyboard replace? And is there a guide for how to replace either single keys for the full keyboard?