Dev Fee is paying for mining software development that you are using, not happy to pay DEV fees use the free one with lower hash rate.
Thanks for ur reply… and what ur using soft to mining.? Sorry. English not my native language
in the file where you setuped your wallet just add -nofee comand to turn off the dev fee
Thats have done do it. But still working rearely dev fee is running, like a remote
there are 3 files where you can add at it and those are config.txt and the start.bat or startssh.bat (dont know which one you use)