I learnt to solve Rubik's cube 2 - 3 years ago, I used to practice once in a while, I can solve Rubik's cube within a minute.
One day, I went to my uncle's house, my nephew had a Rubik's cube, I wanted to solve it, it was so damaged, that it took on average 3 seconds to make one turn, I keep forgetting the intermediate steps, while trying to solve it. I was not under any emotional stress or pressure at that moment, eventually I quit. And, I went to my home, I tried to solve using my Rubik's cube, I was able to solve it. Why I'm unable to solve the same, when I do it slowly?
I can assume, it has something to do with muscle memory, since I've been solving Rubik's cube, for few years, why I fail to remember, when doing it slow?