Thanks for the Cool Care Plus reference. I've been using Clippercide, but when the can eventually gets used up (a can lasts years) this sounds good.

The PAN site lists most of these products (or their parent product since many of these are distributed under various names) and rates there toxicity to both humans and the environment. PAN stands for Pesticide Action Network, so the site is focused on "pesticides"... but in a sense, the viruses and germs we're concerned with are "pests". Cool Care came out pretty nasty, but so do all the other products that really work.

Here's the reference link for Cool Care Plus.