Yesterday I felt sleepy after lunch so I decided to take a short nap before a certain tv show comes on
I started to set the little alarm clock and my husband said he would do it. It was 1:40 and I requested a wake up for 2:55. Got my CPAP on and snuggled down.
The alarm went off and I woke up - not feeling any more rested than when I lay down.
It was 1:55. I had slept about fifteen minutes. He reset the clock but that was the end of nap time.
Maybe a quarter of an hour is long enough for refreshing the brain.