I really don't think there is a way to get around repetition and practice. I am a competitive Rubik's Cube solver, and memorizing algorithms for instant recall

I really don't think there is a way to get around repetition and practice. I am a competitive Rubik's Cube solver, and memorizing algorithms for instant recall is a big aspect for obvious reasons. If I go a couple months, without practicing, I need to brush up on algs. Moral of the story, it is possible to get to the point where stuff is in your memory for a couple months comfortably. But beyond that you will have to do a bit of memory maintenance.