Too inconsistent for me to trust
The inconsistency of my breath results is concerning. I can wake up, sit up, take my wake-up breath, and blow a 3. Then I sit for 3 minutes do a reblow and blow a 1. This is the same for every breath. Before I work out, I can blow a 2, wait 3 minutes, and reblow a 4. I don't get it, but the variance is too big for me to trust this device. I've been using the Lumen for 3 weeks now.