Will best buy replace (or repair) my laptop?

So I dropped a bit of coffee on my laptop and the laptop it self is working fine. But now the keys are sticking, there's a brown spot on my screen. I've had my laptop sent in 3 times to get repaired, and they told me that if anything goes wrong with the laptop again they will replace it. Now is it true that have to do this or is accidental not counted? I was just thinking If it doesnt count I should tell them that when I hit one key like "g", two letters come out. Cause I can't afford to pay for repairs.