This is a way to get rid of the dust on Bitcoin

rawdust-b-gone.md

Find the transaction you want to get rid of:

listunspent

Note the "address" (for later), "txid" and "vout" lines.

createrawtransaction \
  '[{"txid": "THE_TXID", "vout": VOUT}]' \
  '[{ "tb1qryakg74re8an5yc99nsznj4f7t94rghk6m986l": 0}]'

Note the result as RAWTX. The address used in this raw transaction is not important. 0 is sent to it. All goes to mining fees. But it has to be a valid address.

Now get the private key for the "address":

dumpprivkey "address"

Note the result as PRIVKEY.

signrawtransactionwithkey RAWTX '["PRIVKEY"]'

Note the "hex" result as SIGNEDRAWTX and send it:

sendrawtransaction SIGNEDRAWTX

rawdust-b-gone.sh

#!/bin/sh -e

DUSTADDR=tb1qay0y44753qzu8sg4yc2uuqj2t38hfemvgktdpn

bc() {
  bitcoin-cli -testnet $*
}

{
  echo "Now find the bad dust transaction you want to get rid of."
  echo "Select its \"txid\" value so that you can paste it next."
  echo "---------------------------------------------------------"
  bc listunspent | jq .[] | grep '^{\|^}\|txid\|amount'
} | less

printf "Paste the txid of dust transaction: "
read dusttx

RES=$(bc listunspent | jq "(.[] | select(.txid == \"$dusttx\"))")
ADDR=$(echo $RES | jq -r .address)
TXID=$(echo $RES | jq -r .txid)
VOUT=$(echo $RES | jq .vout)

RAWTX=$(bc createrawtransaction \
  "[{\"txid\":\"$TXID\",\"vout\":$VOUT}]" \
  "[{\"$DUSTADDR\":0}]")
test "$?" = "0" || exit 1 

PRIVK=$(bc dumpprivkey $ADDR)
SIGNEDRAWTX=$(bc signrawtransactionwithkey $RAWTX "[\"$PRIVK\"]" | jq -r .hex)
bc sendrawtransaction $SIGNEDRAWTX

See testnet example of a dust transaction removal: https://blockstream.info/testnet/address/tb1qqg24ah8qre3uzutq2sju9jz70xnmvjsq5r67uy