I have had my GD5 Jazz for 18 months now, and never NEEDED to use the rear wash wipe. My rear screen just never gets dirty. I have used the wash wipe, just to see what it does, but if it wasn't there I wouldn't miss it. Even today, after 100 miles on dirty, damp, dual carriageways and motorway (gritting in progress here these nights), the rear screen is still clean.
I know some cars really need them. I hired a 90's FIAT Tipo once, and you needed to use the wash wipe about once every mile!
Anyone else find the same, with their Jazz?