Swore by a 20 minute power nap in my car, switched to 12 minutes flat and my head is clearer
I used to set my phone for 20 minutes in the parking lot at work and wake up foggy every single time. About 6 months ago I tried cutting it to 12 with a louder alarm and a 2 dollar sleep mask from the pharmacy in Reno, and the fogginess is mostly gone. Is 12 the sweet spot for you or does someone out there do better at 10?