toyota corolla rear water jet not working?

I have a toyota corolla T3 1.4l, 03 reg. The rear water jet has stopped working and I get excessive condensation in the car, particularly the rear windscreen. The driver side carpet and mat also is sodden. Does the water tube pass this way and this has sprung a leak? If so is it easy to reach for repair?
I checked the tube to jet and this is dry and still attached okay.
 
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