A scratched up ball will tear up the playfield faster than a new smooth ball.
With a new ball, I always clean off the oil with a degreaser, and put some wax on it. Then replace the ball as needed.
An SOS sponge is coarse steel wool with soap. That's just going to scratch up the ball.
Once a ball is used, I recycle it. Although, lately, I've been dropping them into a clear plastic globe.