I'm on tray 3 of 37 and I've had dry chapped lips since day 2. I got attachments on day 1 and I've notice at night when I wake up that my mouth isn't closed like it used to be during sleep. I'm staying well hydrated so I know it's just from not keeping my mouth closed during sleep. Am I doomed to have chapped lips for the next year or so of my life or with time will my mouth adjust to the extra space needed for the trays and I'll be able to go back my normal closed mouth sleeping? And yes Chapstick helps but I'm applying it so many times throughout the day, it's ridiculous.