[heelix]

I find boiling the water does wonders too. Left overs from the kettle, room temp, make for clear ice cubes.

[hilbert42]

Hacker News is so wonderful, there's a never-ending array of amazing ideas to be found within these readers' posts.

I wonder if patent trolls ever snoop around here. ;-)

[sandworm101]

Because recently boiled water has far less dissolved gasses. So no bubbles.