What is the reason when putting the petri dish upside down in the incubator ?

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Shibabrata Pattanayak

In incubation temperature, water droplet may develop from the water remain in the agar. If these water droplet gather in the agar, it may hamper the growth of bacteria under cultivation. So it is kept as upside down during incubation.

Furkan Alaraji

I think that happened because of water droplet that gathering in the agar, it may hamper the growth of bacteria under cultivation. So it is kept as upside down during incubation .

regards