Pam, While I was in OH I used GreenShield, it is also a very good disinfectant. As far as I know it produces hidrogen-peroxide which is effective against all known pathogens, and weeds. But it also kills plants, so I would put the knives for a minute or so in it and then wash it under clear water. I have a lot of virus pictures, but I have lost most of them with 80 000+ other pictures on my hard drive. Anyway this was my first addition to the wiki, it took me a while :) Janos Z5a, Hungary