Hello from Colorado!

That 'stringing inside' is the actual root. The outer layer that is usually plump, firm and green when wet is called vellum. It's kind of like a sponge for the root. Also, you should avoid getting cinnamon on the roots as it is too harsh for the tender roots. It's a learning curve when you get into orchids and want to be successful. Sometimes there are errors during this period. But it is how we learn. We all have been there!