Large cubes have more internal friction. Using a high-quality silicone lubricant is essential to prevent "lock-ups" during long algorithms.
Most cubers solve large cubes using the Reduction Method. The goal is to turn the complex NxNxN structure back into a simulated 3x3 cube. This is done in three main phases: Xnxnxnxn Cube Algorithms PDF Nxnxn Rubik Cube...
For cubes 5x5 and larger, you cannot simply rotate faces to move centers without breaking others. You must use commutators (moves in the format A B A' B' ) to "insert" specific pieces into their correct slots. Why You Need an NxNxN Rubik Cube PDF Large cubes have more internal friction
Combining individual edge pieces into "solved" triplets or long bars. Xnxnxnxn Cube Algorithms PDF Nxnxn Rubik Cube...