Is this normal???

Hi everyone,

I'm brewing my first batch of Kombucha so I'm not entirely sure what to expect.

The only thing I'm concerned about is the scummy stuff on the inside of the jar (The bits just above the water line)

Are they mold? should I be concerned... or is this perfectly normal.

I didn't boil the jar to sterilize it but I cleaned everything thoroughly.

I used white sugar and white tea. It's been brewing for five days.

Thanks.

*Last two images describe what I'm talking about *











B.