Heat-molding hockey skates can make them more comfortable. Many sporting goods stores have a specialized skate baking machine that you can use if you purchase skates from them, but the heat-molding process can also be done in an oven. Skates do not need to be heat-molded--they will break in over time through normal use--but the heat speeds up the process.
Pre-heat your oven to 180 degrees Fahrenheit. When it reaches that temperature, turn off the oven. Ensure that the oven is not left on before placing your skates inside.
Loosen your skate laces within the boot of the skate. When the heating is complete, you should be able to put your foot into the skate without having to struggle and bend it.
Place the skates on a baking sheet in the oven. Again, it is very important for the oven to be off in order to prevent damaging your skates.
Monitor the progress of the skate heating. Typically the process takes no more than 10 minutes, but you should constantly check to make sure the skates are not becoming deformed or are showing any kind of melting. Some skates are made with softer materials than others, so the heating time is dependent on your type of skates.
Remove the skates from the oven and check the temperature. If it is not too hot, place your foot inside and tie the laces very tight. You do not want your foot to move around while the molding is taking place, or you won't get a proper fit.
Keep the skates on for roughly 15 minutes to ensure the molding is complete. While they are forming to the shape of your foot, you should remain fairly stationary with the blades flat on the floor for optimal molding.
Take off the skates and let them sit for about 24 hours before using them on the ice.