Not sure what's happenig there maybe it's because you may peel it too much. Here's the bed i planted 10 days ago with the same method and got 100% success so far out of 50 garlic only 4 haven't sprouted yet but I'm sure they're on the way..
They look amazing! So far 1 out of 3 sprouted, though I've got some in a windowsill sitting on just a glass of water. THey've got great roots! But now I don't know what to do with those haha.