My test has failed 3 times. WTF?

Last time I chewed the hell out of my cheeks, it was above the line (liquid, not just bubbles).

I'm a regular cannabis user, but otherwise don't smoke. I followed the instructions to not smoke/eat/drink/brush before. Every time I tested first thing in the morning

This is especially annoying because there's a bit of family lore this test will likely confirm.

Do I really need to go with the "fake spit" method?

Any tips for test #4?