Well in the past I have used soap and water to "clean" my tools first and 1:1 bleach to disinfect afterwards and haven't had a problem as yet.
I work in an Ophthalmology unit in a major teaching hospital and we are no longer allowed to clean out optical instruments with alcohol as has been stated before it sets the viruses but not kill them.
In Ophthalmology we have to be exceptionally careful with disinfecting as any laxety on our behalf could spread a disease from one person to another thereby causing blindness. Don't orchids deserve the same care ??
We now have to use a moist towelette which has a mild soapy solution to clean chin rests, tables instruments etc., this wipes of the "bugs", and THEN wipe over with alcohol swabs. Maybe the same should follow for orchids.
If needed I can get the infection control RN to send me the full details on what to use and why as he is a personal friend of mine.