@Romi: From the research, IQ options applies inactivity fees or doormant account fees. IQ options charges a penalty when an account is inactive for 90 days. The penalty fee is 10 Euros per month. So, when your account still has 35 Euros and is inactive for 90 days, the first month's penalty will deduct 10 Euros (remaining balance of 25 Euros).
In the following month, a doormant account fee of 10 Euros will be taken (remaining balance of 15 Euros). And so on until the account reaches 0 Euros.
What if you don't want to pay the doormant account fee?
Simply, just let the account close itself by IQ Options. In this case, your account is no longer needed.