Laptop's keys working automatically what to do

Why my laptop's keys are not working
                                                           OR
                                                               Why this working automatcally

Do have problem like this .Do you know why this happen, how can i care my laptop from this issue

1. First you must take care your laptop from dust
2. and don't allow to touch water with your laptop
3. Please use your keys softly 

If your keys working automatically the issue by water in under your keys so just make it clean 

or go to shop and clean your keys under .