I tried Tresiba a while back and changed from being on a split dose of Levemir. At first I needed less but I think it was because there was still Levemir in my system that took some time to clear out. Once this happened I started to increase my Tresiba dose. My issue with it was it seemed like my dose was always too strong at night and then about 16 hours after injecting it would vanish from my system, as if I had no basal insulin in me at all. I don't know if this is due to absorption problems or my own biological basal needs - i.e. I need more less basal through the night and more in the afternoon, and a basal as flat as Tresiba doesn't work well for this. Either way I gave up after 3 weeks as my blood sugars were skyrocketing around dinner time and it was taking a toll on my mental health. I went back to Levemir and haven't looked back since. Maybe give it more time than I did and keep trying to find a dose that works for you!