Other cleaning steps
A person may clean the toilet bowl, adjust a component, or perform maintenance around the same time they try the foil trick.
If the problem improves, it may be difficult to know which action made the difference.
Expectations
When people expect a hack to work, they may pay closer attention to improvements while overlooking unchanged symptoms.
This doesn’t mean anyone is being dishonest. It simply means personal impressions are not always reliable evidence of cause and effect.
Videos show results, not necessarily proof
A short video may
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