A couple of days ago, I accidentally spilt some frijj chocolate milkshake on the aluminium wireless keyboard, and as a result, the f key and left shift are null.
Does the Apple warranty cover accidental spillage?
Any way of fixing it?
Apple warranties for any device or accessory do not cover accidental damage. If you purchased it with a credit card, your credit card company may have a clause covering damage to purchased goods. If it doesn't, you'll probably have to purchase a new wireless keyboard.
Gently pry the keys off by pushing the bottom side down and the top side up. Apply steady, even pressure to the keys. Once it pops open, clean the key and the space underneath it. If it still doesn't work, then you need a new keyboard.