Product review (5 stars): The hair dryer failed, this worked!
Went to youtube and tried the hairdryer. Gave up after 30 minutes.

Went back to youtube and tried an air mattress pump with a hose. 45 minutes, nothing.

Tried the frozen water line tool, victory! took all of 3 minutes. Here's what you do:

1. Fill the syringe with hot water from your tap (doesn't have to be boiling, just warm/hot)

2. Insert the plastic tube as far as you can into the water line until you meet resistance.

3. Squirt the entire contents of warm/hot water.

4. Repeat until the water is running from your fridge again (in my case it took 3 rounds of hot water)

Now, for those of you who read this far and think "it's just a hose and a syringe, I can buy these myself for a lot cheaper." Don't bother, most hardware stores don't carry this gauge of plastic hose, it's medical/IV gauge. Don't waste the time/energy, just buy this thing and be done with it.