No, spraying again will not get the 1%. Virus is either DNA or RNA. Assume that the living matter in virus is the DNA or RNA. Although conventional medicine says that virus is neither dead nor alive. Hepatitis B virus consists of empty protein surface (non infectious) and protein surface with DNA that is infectious. There are more empty protein surface than protein surface with DNA in a teaspoon of blood. The same is true in the air. However, blood test or test for antigen will recognize both empty protein surface and protein surface with DNA. That is false positive. That 1% could be empty protein surface that cannot be "killed" because they don't have DNA. Anyway, the don't replicate and infect.
A virus comes alive when it looks for a hole in the cell to get in and inserts its genes in the chromosomes of the host.