The caveman method did make my room slightly cooler in heatwave but my messed up body clock meant I still couldn't sleep.

That’s why you might feel foggy or sluggish after sleeping in a room that wasn’t dark enough. Over time, this impaired cleanup process may contribute to more serious issues.

Afraid of the Dark, How to Sleep Better. Nyctophobia, or an extreme fear of darkness, affects both children and adults, often stemming from past trauma, anxiety disorders, or evolutionary instincts.

Getting to sleep during a British heatwave is always a struggle, ... Embrace the dark. Whilst the sun might look lovely outside, as it blazes in through your window its heating up your room.