How to extract your own DNA

[Insertnamehere]

Thanks Insertnamehere, even though I didn't understand the explanation althougth I guess that the gist is that the DNA extracted by this home method would be pretty much useless for scientific purposes. That more or less answers my original question.

Ok, to summarize, then, so as to not complicate you:

What this home experiement is trying to teach you is that DNA extraction is fundamented in rather simple techniques than can be performed with common items and that it can be understood with school-level knowledge about cells and macromolecules.

But yes, it needs to be done in much more controlled conditions if you are to have a pure enough sample to use it for downstream applications. Not only cellular contaminats but environmental ones: the fungal spores in the air, the bacteria in your skin, etc, etc.