You could theoretically test bath water for DNA- however the amount of DNA in the water of any detectable is questionable- the primary form of DNA in the water would be from skin cells- the amount of cells in the bath would depend on how thoroughly you scrubbed as well as other factors- the amount in any bottle would be random and based in part on total volume of water on the bath to start. The types of cleaners you used- temperature of the water in the tub, age of the water after the bath, and conditions such as ambient temp, UV exposure etc. of storage and transport would matter too.
In the end you’d be lucky if you could find a cell you could even determine was human, and pretty much forget about identifying it as belonging to the person in question- which I may add you’d need a verified sample of their DNA to compare against to even do. The original claim there was no DNA was made before the water had even shipped and was debunked. But it’s really not verifiable if said water is legitimate or not.
Just as fun facts. The humor and overall absurdity of the situation isn’t lost on me.
Just as fun facts. The humor and overall absurdity of the situation isn’t lost on me.