Research on rodents. https://www.the-scientist.com/news-...channel-gene-tied-to-more-restful-sleep-67529 Paper here
ETA links and winks. Loss of aquaporin-4 results in glymphatic system dysfunction via brain-wide interstitial fluid stagnation, 2023. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9995113/ Brain Waste Removal System and Sleep: Photobiomodulation as an Innovative Strategy for Night Therapy of Brain Diseases, 2023. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9965491/ This suggests wearing night-time headgear with 600–1300 nm LEDs, but it should include a cooling system to ameliorate the heat they'd create. (I'm off to the workshop now )