Now we attack to the keyboard part.
In order to unlock it, we need to push-up toward the screet the TWO small fixing points. These are just right up the F2 and Insert keys (note I have a spanish keyboard QWERTY) See pictures below. you can use small scissors for this, and do not force it. Pushing and moving shouls always bea done nice and smoothly, otherwise something is wrong.
Good, now we can pull up the keyboard slowly and gently as in the pics below:
Carefully turn the kwyboard 180 degrees with care not to pull the green bus-cable (see below)
now we need to de-attach (or untie) the green bus-cable in order to completely release the keyboard. This is a delicate operation, be careful because you can easily damage the green bus-calbe or the connections.
Unlock the connector by pushing down the side locks. (carfully) This moves 1-2 mm down, no more. Repeat operation in both sides (see below)
The cable now is free to go in-out the connector.
There you go!!!
your keyboard is free. You can clean everyting with a vacuum cleaner.