you're correct on the vinegar bath.

as for removal, sorry I'm not useful there. please post how you do it though, as mine has been "spitting" for years and I need to see if the filter screen is clogged or perhaps the sprayer is just clogged (ie vinegar or CLR fluid bath).

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S