1, conch smells fishy because there is carrion in it that has not been cleaned up. Simply washing with water is useless, but it will enhance the foul smell. First, check the screws, water pipes and the parts you can touch with your hands for dark brown paste. If there is, scrape it off with paper or hard objects, and then clean it. After cleaning, be sure to completely control the water (you can't hear the underwater sound when shaking the conch), and then put it in a ventilated place for at least one week (don't let the sun shine directly on the conch, it will fade after a long time).
2. If there is still a strong smell afterwards, plug the screw with a big ball of cotton. You can plug the cotton with your hands as much as possible, so that you can't see the cotton from the outside, which can alleviate some smells. But it is impossible to completely eliminate the odor, because the position of the carrion may be quite inside, and it can't be washed out at all.
For more information on how to remove the odor of conch, please visit:/ask/069E3116109486.html.zd for more information.