I have an Audi Q5 that periodically demands AdBlue to be filled up. Using a 10l bottle, I have never found it easy to fill, with about 50% of the contents frequently not ending up in the AdBlue tank, but dripping all over the back wheel instead, via the spillage drain hole. I am carefully positioning the breathing tube above the delivery tube, and some times it works well, and somethings, like today, it constantly chokes and spews AdBlue everywhere except the tank. Is there a trick I don't know about, or is there variability in the filling tubes meaning some work, and some don't? I f the latter, I seem to have a particularly duff one today. It is really tiresome, and I believe it should not be hard to fill a car with this stuff, but it really is. Help!