Occasionally lick your fingers to use as moisture for polishing the ball. It’s illegal in the game to use any foreign substance to polish the ball. This includes any residual sunscreen you may be wearing. Umpires and other players will keep an eye out for this. If you are caught using an illegal substance to polish the ball, you’ll be fined and banned from the match.
Shining only part of the side will result in a less polished ball and will not reverse swing as effectively.
It’s common to see red stains on bowlers’ pants after they polish a ball.
Air flow quicker around the rough side of the ball while the smooth side creates suction, pulling the ball in that direction. [4] X Research source
Don’t change the style you’re using while you bowl since it could be a giveaway that you’re trying a new technique.
Alternatively, point the shiny side of the ball towards the batsman for the ball to swing away from them.