Cold Mirror Test. Hold a very cold mirror about one-and-a-half inches from your mouth. Say “aaahhh.” Check the mirror. If it’s foggy, you’re allowing too much breath to escape as you speak. Wipe the...

Cold Mirror Test. Hold a very cold mirror about one-and-a-half inches from your mouth. Say “aaahhh.” Check the mirror. If it’s foggy, you’re allowing too much breath to escape as you speak. Wipe the mirror off and try again, saying “aaahhh” much louder. There should be less fogging. Practice until you can keep the mirror from becoming foggy. Then repeat this activity with the sounds “oh,” “ow,” “ee,” and “oo.”