I have just noticed that the intermittent wiper on my car is not very intermittant at all

Now either I'm being a total spoon, or its not working right?

If I click the wiper onto the setting it wipes once. Then won't do it again unless I change the speed. But even then it will only do it once. If I move the stalk so it is doing the back window too, it occasionly makes the front work.

I have tried it on every speed setting and nothing. Another thing I have noticed is if you have the wipers on, they stop when I stop. Now I've only tried the intermittant when I'm parked up, since when I'm driving the screen gets so I can't see before it wipes. Maybe it doesn't work when your parked up?

Anybody any ideas? Is this a common fault?