I couldn’t get tested so not 100% that I actually had covid but as soon as I started having some symptoms I started gargling with diluted hydrogen peroxide and rinsing my sinuses with a strong saline solution. I can’t see how this would hurt and why this isn’t recommended given that the virus replicates in the nose and throat.
The viruses are replicating inside your cells. You can't just "disinfect" living tissue without killing it. There is a reason why medicine relies on evidence and does not recommend whatever random "treatment" someone came up with.
And you disinfect your mouth because disinfecting doesn't mean killing your mouth/tongue tissue. There are several mouthwashes on the market with antibacterial/antiviral properties, dentists do the same, etc...
In Bavaria they are only testing people with symptoms and the positive rate is around 10% [1].
Everybody thinks they have it but the symptoms could also be down to a cold. I am not pointing this statistic out to prove you wrong -- I just find it interesting.