I don't know about you, but I shut my eyes when I try to sleep! Sensory stuff is likely to be more subtle, mostly subconscious things like differences in the ma

I don't know about you, but I shut my eyes when I try to sleep! Sensory stuff is likely to be more subtle, mostly subconscious things like differences in the mattress, ambient temperature, smell etc and your brain probably stores the fact you navigated to a different place somewhere.