So with the hole in the ice ball mold facing the bottom of the pot, as the water in the mold turns to ice and expands, it pushes out the extra air-filled water out the hole into the pot below. Using this pot the water will freeze from the outside-in, but the big pot creates a big heat sink so the top will be clear until after the ice ball is fully frozen. In the Cooler Method I force that to be top-down. In a typical ice cube, that's outside-in, with the cloudy part in the center. That's the whole trick.Īs I figured out during all the ice experiments, the water freezes directionally from the coldest place to the warmest and the first parts to freeze are perfectly clear whereas the last area to freeze is cloudy from trapped air, impurities, and pressure cracks. The water should stay inside the ice mold rather than running down into the pot. As you pull the mold up out of the water to set it on the wire. Feel free to fill the ice ball with distilled or filtered water for better taste.ĭunk the filled ice ball mold into the pot of water with the hole FACING DOWN. Fill the pot with water just up to the wire. Over a pot of water (or better yet, a cooler as that will produce lots of clear ice) make a wire loop that the ice ball mold will sit on.ģ. Get yourself a silicone ice ball tray like this one that comes in a pack of six.Ģ. This is a stack that makes a Perfect Clear much more likely, since it is built with every tetromino from the first bag and has 12 holes, to fit 3 tetrominoes from the second bag.Artwork by Craig Belon, as are all photos in this post except the next one.ġ. Look for tetromino combinations that will make it succeed.Create a stack that makes a perfect clear more possible.However, failure is not as bad because you can continue making a stack for T-Spin or Tetrises. It also requires a lot of understanding and practice to make it work in a game. Note that this guide does not guarantee a 100% chance of success in making a Perfect Clear. If you succeed, this usually becomes a K.O.

The best scenario is to attempt it at the beginning of a game, when your opponent has not finished building up their stack. This guide tries to give a higher chance of performing a Perfect Clear. A Perfect Clear (PC) means having no filled cells left after a line clear.

Perfectly clear complete version 3