When emptying wallets using TC, there’s no way to transfer out any amount below 0.1 eth. DustDevil is a somewhat complicated solution proposal.
A simpler solution is to gamble with the dust. E.g. if you have ~0.05 eth, enter a lottery with a 50% chance of winning 0.1 eth. If you lose, your problem (money) is gone. If you win, you can privately deposit the 0.1 eth into TC as usual (need slightly more than 0.1 eth to cover fee of course).
Can anybody recommend a minimal, fair gambling dapp to facilitate the above? And if none exists, perhaps we could make one and add it to the TC interface. With a standard house advantage it could be a new source of revenue for the TC treasury.
PS: Another great, simple solution is to donate the dust to a worthy cause in a non-private transaction, if such a transaction is acceptable.