Something about toxic change form whirlpool
Discussion
Even my change is toxic 😂
But yes, Sparrow whirlpool breaks the mixing utxo into equal chunks, you can choose 100,000 sat or 1,000,000 sat chunks. So if you send .03100000 sats to the whirlpool, you would end up with three .01 mixed utxo and the remainder would be badbank minus the whirlpool fee.
Try WabiSabi coinjoins with Wasabi, BTCPay Server, or Trezor. You can create chunks of any size, so there's no toxic change leftover unmixed in the "bad bank".