MiraFiber Platinum® cloths will pick up 99.99% of bacteria; after the cloths are rinsed, the cloth will kill any residual bacteria left in the cloth within 24 hrs. (cert. ACT Labs).  There is nano silver embedded into the cloth, which is what kills the residual bacteria, therefore the cloth does not need to be treated with anything.

IMPORTANT: Although silver is widely known to be effective at killing bacteria and several types of viruses, we do not make any claims that it will be effective for killing Covid-19; we have only had the cloth lab tested with bacteria (ACT Labs). 

“Silver nanoparticles have mainly been studied for their antimicrobial potential against bacteria, but have also proven to be active against several types of viruses including human imunodeficiency virus, hepatitis B virus, herpes simplex virus, respiratory syncytial virus, and monkey pox virus.” Ref. NCBI Oct 24, 2011