I have an intermittent rear wash wipe on my 2003 1.9TDi Avant. Removed the boot liner trim, disconnected the motor but completely unable to remove the wiper arm.

I've removed the retaining bolt but the wiper arm is firmly fixed to the spindle (probably via rust?). I've spent nearly two hours this afternoon pulling and twisting the arm still without success.

In the meantime I removed the motor cover and its full of water, rust and crud but till that wiper arm comes off I cannot begin the repair.

Am I missing something here to get the wiper arm off or can someone suggest a way to remove it.

Rich