Apologies for resurrecting this 4 month old thread, but I have the same thing happening to my Samsung fridge, but having tried everything mentioned here it's still leaking.
Yesterday I aired out the fridge (and gave it a good cleaning) and unplugged it to try to fix the problem. After work last night I dried everything up, poured a little bit of salt down the tube and chased it with 2 cups of hot water, then dried it up.
Plugged everything back in, put the food (minus the veggie drawers) back in and let it do its cooling thing all night. Came home today and there's quite a bit of water pooled on the floor of the fridge section.
I'm thinking that the lip mentioned by BoardSMITH is the same thing that somehow got knocked out of place.
Here's some pictures.
View attachment 8784View attachment 8785View attachment 8786View attachment 8787
The foil lining the bottom of the drip tray front (in the third pic) has also "rusted" right through, so that may be it.
Shouldn't have to do ghetto repairs on a $1500 CDN fridge.
My fridge is only a couple of years old and when I replaced the old drain clip it was starting to rust/corrode like yours is but not as bad as yours, yet, but probably in a few more years if I kept the old clip in place. Looks like you have galvanic corrosion from the drain clip. It seems they used two different metals in the drain clip, aluminum for the clip and something else for the rivet. The new replacement clips are all aluminum so this corrosion problem shouldn't happen once the old clip is removed and the new all aluminum one is installed.