How should I handle the scenario when the interest amount provided by the bank is less than the maintenance fee charged by the bank?

My wife had foreign bank interest income in 2017. However, the interest rate had dropped considerably from 2016 and the total interest amount was actually less than the maintenance fee charged by the bank. Can I include the maintenance fee as a loss someplace? It seems weird to pay tax on the interest, when we actually lost money (due to the maintenance fee)