Preventing Ice Cubes from Sticking
1.Don't overfill the tray. Ice cube trays have individual pockets for each ice cube for a reason, and making sure the water stays within the boundary of each pocket will help make your ice cubes easier to get out of the tray when they're frozen.
If the water in the ice cube trays is connected, it will freeze as one large block of ice, which will be harder to break up and remove from the tray.
2.Don't stack ice cube trays. When you stack ice cube trays on top of one another, cold air from the freezer can't get in between the trays, will causes the ice cubes in the bottom tray to freeze from the bottom up. Because water expands when it freezes, the bottom will then expand into the bottom of the tray, thereby sticking to the tray.
If you need multiple batches of ice for a party or special recipe, freeze the ice cube trays one at a time, and then stack them once they're all frozen.
3.Clean out trays before refilling them. People will often refill a half-full ice cube tray to make sure they have enough ice, but this can cause the ice to stick to the tray. Instead, empty the ice cube tray completely and let it dry out before adding fresh water to make more ice.
Once frozen, ice can always be transferred to a sealable plastic bag or freezer-safe container if you need to free up the tray to make more ice.
4.Try a soft silicone tray. While ice cube trays were traditionally made of metal, plastic is now the material of choice. However, some newer ice cube trays are made of a pliable silicone, and these can be great for ice because you can actually poke or pinch the bottom of each ice cube pocket to release it from the tray.
To remove ice cubes from a silicone tray, flex both sides of the tray to loosen the cubes. Hold the tray in both hands, and place an index or middle finger under a single ice cube on the bottom of the tray. Push against the bottom of the cube with that finger, and the ice cube will pop out. Grab it with your other hand while still pushing it from the bottom.
Silicone trays work best when they are clean and don’t have a cloudy residue inside, so wash them out with hot soapy water and a brush between every filling.