You can buy a kit with ball, spring and fibre washers. Clean the gauze on the front, check the ball seat and if its in good shape you can reassemble making sure its perfectly clean. Also, dont be tempted to over tighten it into the crank case.
The main thing to keep it in good nik is regular oil changes. If any crud gets stuck under the ball, you will loose pressure to the big ends and bang... [another reason not to over do the blue hylomar]