How do you wash vases or glassware with a narrow neck? This is one of the hardest thing to wash, isn't it? I use a baby bottle brush which will work sometimes although it does not work for bottles with a narrow neck. I have a Hummingbird feeder that is hard to clean and I am glad I found this handy tip. To wash glass bottles or vases with a narrow neck, add a little uncooked rice to the water when you're washing it. Your glassware will sparkle.