here is my silly take for strictly covid-19 cleaning - since the  
covid-19 is a double layer lipid structure virus, you can (1) use  
soap - assume same you used for electronic cleaning, like  
surfactant.  (2) virus will disintegrate its double layer structure  
above 56 C - you can use what ever to heat up to above 60 C to get  
rid of it (water soluble flux cleaner with a dryer will do just  
nicely for assembly or mats if it can withstand the temperature). (3)  
IPA - 70% or 75% should be able to clean it - assume allow to  
completely dry prior to use.  (4) UV (inefficient due to shadowing)  
or plasma that both kill it  using short wavelength light and heat -  
if you really want kill it for sure, add down stream h2o2.  etc.  
etc.  what ever the method you select, as long as you breach its  
double layer lipid structure, you win (provide you do not deposit on   
the clean surface again).
just a silly thought.  - (by the way, wash my hands so frequently, my  
skin peeled off... no fun).
jk
On Jun 11, 2020, at 3:41 AM, Nigel Burtt wrote:

> Did we ever come to any conclusions about "safe" disinfectants to  
> use in electronics manufacturing/PCBA assembly areas, before all  
> the old heads started getting 'Nam hooch flashbacks?
>
> The 'Formula 409' mentioned seems to be uniquely US product and  
> unavailable anyway. All the good stuff, whilst it is good for  
> cleaning benches mats etc  appears to risk leaving residue that may  
> be corrosive if any contaminates product.
>
> Anyone using stuff like 'Versan' broad spectrum disinfectant  
> (active ingredient low % sodium hypochlorite) or 'Bio-Hygiene' all  
> purpose sanitiser (active ingredient lactic acid)
>
> Is dilution only with DI water recommended with these types of  
> cleaners rather than straight from the tap/faucet?