I got one-for some reason it didnt come with instructions. I google'd " shock doctor mouth guard fitting instructions" And i found 2 articles and they are both identical EXCEPT one thing- One site says put the mouthguard in the boiling water for 90 seconds- Fill a saucepan with water and bringing it to a boil. Drop the mouthguard in the boiling water for 90 seconds (do not exceed 90 seconds). Tongue tag should be facing down in water. Remove the mouthguard from the saucepan with a slotted spoon and run it under cool tap water for 1 second only to cool the surface temperature. the other for 10 seconds.. 2. Remove water from heat source. Immediately place mouthguard in water for 12 seconds (10 seconds if you wear braces). Do not exceed insertion time. wtf? I dont want to cook my mouthguard, i know a few of you guys have shock doctors- so some help would be nice. And WTF no instructions.