Car: MY13 1.8 EX Auto
Join Date: 7th January 2007
Location: West London
Thanked 1,708 Times in 1,431 Posts
I found that when I removed the bungs completely there was a dirty brown/green 'tide mark' left by the bungs edbes where the water had collected on it's way out.
My vote is remove them completely and the water can run straight out and the area stays totally clean.
I was also forever knocking them off when leathering along the bottom edge of the open door.