My friend swabbed her nose with silver gel before taking mandatory COVID tests. Hopefully some of the nanoparticles were taken out by that.
I was scared to do anything but xlear BEFORE the tests in case it would show as covid. Good to know that works also.
All last year i had my daughter swabbing her nose with Nozin due to school policy of un-vaxxed having to test weekly.
Never tested positive once