You don't need to do that every night. When you can, it helps check for the nadir, that lowest point which lets you know if the dose could be increased or should be decreased. Also, in terms of human sleep, waking up on a multiple of about 45 minutes makes it easier to wake - ex 6 hours after going to sleep, 6 hours 45 minutes, 7 hours 30minutes, etc.
That mid-cycle, near nadir reading suggests you could safely increase another 0.25 units. Also note that Levemer tends to have a later nadir, sometimes even as late as right before pre-shot, depending on the cat, so checking later in the cycle may be most helpful to you, when you can squeeze it in.