3 KEYS OF KEY BOARD NOT WORKING AND S IS STUCK (by 2 users)

I do agree with melnavz here: you need to clean the keyboard first off. However, i don't think it's necessary to clean each key by key because taking keys off is rather tricky. You can replace individual keys on a laptop keyboard instead of having to replace the whole thing only if you have extra keys stashed somewhere. Nonetheless, another keyboard really shouldn't cost all that much if it is the problem.