I need less insulin at night, so I have less carb ratios and less basal settings for the evening and the night. If you are still dropping continually every night you need to lower it even more.The figuring it out of the amounts is the trick, because you usually make small adjustments until you find out what works. I have always needed less insulin at night, but about 6 months ago when I first started adding using an inhaled insulin for some reason my needs at night really dropped to about half of the already lowered amounts I had set. I did use a separate program for it because I wasn't sure how long it would last and it was significant adjustments.That did end up changing back closer to my more normal lower amounts after a few months.
But the other thing that happened is a huge DP increase. DP is Dawn Phenomenon. It's a liver dump of glucose usually around 5 am to get your body ready for the morning when you wake. "Normal" people make insulin to use it. I had mild DP before I started the inhaled insulin, but along with the drop in needs of insulin, my DP shot through the roof for a bit. Then it dropped back to mild after maybe a few weeks and after a few months has now gone away. But I program in an extra dose of insulin around 5 am. It's just the only way you find out you don't need it anymore is by being woken up by dropping too much. My getting DP is an off and on thing so I am used to making adjustments for it.
I was sure sleepless too the first couple of weeks trying to figure out what was needed and going on with me!