I wanted to add that there is a trick to get it to 106 (at least with my version that I just bought, model 300) It is to hold the 'Jets' button + the '↑" button for 10 seconds, this will kick it to 105. You can repeat and get to 106. It stops there though. I wish someone would come up with an easy hack for this. I really need 110 water for real relief.