Create a file called dogecoin.conf and add the following line
harddustlimit=0.01
now save the file and put on the folder were your Dogecoin Node is installed and restart your node.
You can also download a alredy made dogecoin.conf file clicking
here
Windows Folder: C:\Users\[YOUR USERNAME]\AppData\Roaming\Dogecoin or ( %APPDATA%\Dogecoin )
MAC Folder: $HOME/Library/Application Support/Dogecoin
Linux Folder: $HOME/.dogecoin