Here is what the rules say about that:
17. Exercising Options - In-the-money options that remain on account at expiration will be sold off at their intrinisc value. Out-of-the-money and at-the-money options will expire worthless. To exercise an option, users must contact customer support.
I didnt realize it was that like that. And tomorrow is option expiration for November. I usually trade the options, I have not exercised an option here.