Then you doing it wrong. Only use faucets that use the Xapo wallet. Every payout from each of these faucets go to your Xapo wallet and it's all off-chain. Once you have built up

enough coins, you transfer one amount to a online wallet and it becomes part of the blockchain. This way you create no dust in your account and you can spend almost everything

you own from these faucets. I do this and pay no fees on any of my transactions. You just need to do it right.