I scrape and brush my tongue and use mouthwash but my tongue still smells

Before I brush my teeth or do anything, I lick my hand, wait and few seconds and smell it, and it absolutely heaves, as you might expect. But then I will brush my teeth, scrape and brush my tongue, and use mouthwash for at least 1 minute. Then I will wait a few minutes and lick my hand again and smell it and I'd say the smell is gone by 80% but it's still not completely gone.

I don't smoke or have any bad oral hyenine issues, is this normal? Why is it so hard to get the tongue to smell completely neutral / fresh?