The first piece to remove is an edge piece.
- Turn the top layer 45 degrees.
- Insert the screwdriver (or knife) under an the edge piece on the top layer, and lever it up.
- It should slide out with only a little effort.
Note that in the whole process, this is the point where damage to the cube is most likely to occur. The cube in this picture was a made-in-China model I bought for the equivalent of USD 0.60. The plastic was so flimsy that each time I took it apart, there were little chips of broken plastic everywhere. However,
the cube could still be used. At least, until my 8 month old threw it down from the top floor of our house. But that's another story.
Remove two corner pieces
The two corner pieces next to that edge piece can be lifted out very easily.
Remove an edge piece from the middle layer
Next, remove the edge piece that was directly under the three pieces you've already removed. Do this by sliding it upwards. This may take a little effort.
Remove the rest of the top layer
Now you have a gap in the middle layer. If you turn the top layer, the pieces can be taken out one by one very easily when they reach the gap. The corner pieces in particular are very easy to remove.
Clean out the middle layer
There are three more edge pieces in the middle layer. Remove them one by one by sliding them upwards.
Get the bottom pieces out
The corner pieces on the bottom layer can be lifted out very easily. Actually, by now the rubik's cube is almost dismantling itself. It's as if, having seen all the other pieces taken, the last few are saying 'me too! me too!'. A bit like lemmings. Just twiddle the faces they are on, and out they'll come.
The Rubik's Cube, fully dismantled
So there it is, fully dismantled. Notice the centre pieces are all connected together on a central frame. Observe the eight corner pieces, and twelve edge pieces.