(1). Plug to the shofar mouthpiece with an ear plug.
(2). Pour in enough gravel that it can still be shaken easily. Plug the large end with a soft ball (You can use foam nerf ball).
(3). Now shake it about 10-15 minutes.
(4). Empty the gravel from shofar & remove the soft ball.
(5). Fill the shofar with alcohol & put another soft ball.
(6). Now shake it about 2-3 minutes.
(7). Empty the alcohol & remove the soft ball.
(8). You can put the shofar to let him dry. (You can repeat the process as needed).
(9). Finally, you have to use an anointing oil this is contains myrrh which is a natural preservative. Pour a small amount of the oil in the bell of the horn and swirl around. Oiling the shofar is must in order to keep it from cracking.