Ok ive had my budgie for over a year and when he was about 4 months old his nose started to turn brown. Now its fully dark brown and flakey, and ive looked up the scaly face thing budgie can get and its not it coz his nose is brown. he doesnt seem to be in any discomfort im just scared coz it hasnt gone away since he got it and im scared plz help

also im scared to go to a vet coz they killed my last bird.

is there anything i can use to clean it that doesnt have chemicals or something??
i lightly scartch his nose n little flakes come off i just dont want to hurt him