Very good idea.
I was denied the use of different swab with the PCR test that I was refusing before surgery last year. I was very seriously ill and ended up giving in for the test.
Afterward I had strange reactions, funny scents (smell,) tingling in palate and upper teeth, constant congestion in left sinus cavity (the same side of PCR test) and a few other things.
Consider the possibility the swabs are toxic with foreign debris, not just because the preparation was not sterile, but by design. There is not a single thing I trust concerning these Covid tests or treatments.