Pull each wiper arm fully away from the glass until it locks. Swivel the blade through 90 degrees, the squeeze the locking clip and slide the blade out of the arms hooked end.
Do one side at a time so that if you do get disorientated you have a fitted one to refer to when fitting the replacement blade.
On refitting, ensure that the new blade locks securely into the arm.
On my 206cc I bought genuine Peugeot blades. They fit perfectly and make the job so easy.
ChicksFan, September 2010