Product review (5 stars): Fridge is water free!
I've been dealing with ice building up in my freezer and eventually water leaking into my fridge for years. I've tried changing the tilt of the fridge, wrapping copper wire around the heating element in the freezer, and finally just pouring boiling hot water down the drain line every month. To think a simple $5 part could've solved all my woes years ago...

(My idea of wrapping copper wire around the heating element was based on the same idea as this part but I must not have been able to make good contact, or had the wrong gauge, as the wire turned black after a few weeks. It's been a month so far with this part and no chemical reactions to it yet!)