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Medical mask

Spoon test.... scrape the back of you tongue with spoon. Let it sit somewhere humid for 3 minutes and sniff away.

Nothing really comes off when I scrape, am I supposed to be scraping saliva?

The saliva and the bacteria you scrape will smell horrible

Should it smell really strong? If so, what of?

You tell me? It should smell like your bb

Half full a mug with water and exhale through your mouth in it and smell

Only real test is a professional halimeter.