In some families, this habit is passed down from generation to generation, often without a precise explanation.
Why do some continue this practice?
By tradition: “We’ve always done it, so why stop?”
By personal belief: Some people claim to feel a lighter, calmer atmosphere after completing the ritual.
An unfounded habit?
Yes, but like many beliefs, the important thing is the effect it has. If the action brings a sense of well-being, why not embrace it?

Conclusion
Throwing a garlic clove in the toilet before sleeping is a practice that blends traditions, beliefs, and supposed benefits. While garlic has antibacterial properties and a powerful odor, its effectiveness as a purifier or disinfectant for toilets remains limited.
However, whether out of curiosity, tradition, or simply for the experience, everyone is free to adopt this practice. After all, a little mystery and symbolism in our daily actions never hurt anyone!