Maybe you noticed, maybe you didn't, but Binance added a feature I wish all exchanges had....
If you click Convert to BNB, you can convert all your dust amount, any amount, to BNB. This is nice to get to use those funds that are too small to make a trade with. BNB is a great coin, and saves a good amount if used to pay fees on the exchange. Also this helps clear up your Ledger.
Good Luck out there!