I dont ridicule it others do that already.

Believe in it hell no....theirs no proof.

I mean have you done tests for bacterial growth before?

Tested for colonies?

Even under the strictest conditions theirs so much bacteria called 'rain' in the air falling randomely onto what ever your incubating...like rice that the results would be hard to determine and how can you isolate 1 thing like a word unless you did the test in triplicate at the same time under the same conditions and also did blind tests as well.

Of course you would have to make sure the jars were completely sterile aswell as the lids.

you would have to open the jar for a minimal amount of time near a heat source to keep the rain from entering the jar.

All implements would have to be heat reated and sterilised before and after each use.

for all jars. then incubated in the same place for the same length of time.

then you might start getting somewhere.