Fair enough. In my defense, I've had the same can for almost 40 years, use it judiciously, and guesstimate that it's kept at least a couple of thousand US$ worth of electronics in service that would otherwise have needed expensive repairs or, worse, been disposed of and replaced by new stuff, with all of the environmental consequences those entail. But I will explore alternatives, and I see that there's a new version of the product (Chemtronics Electro-Wash) that doesn't have CFCs. Thanks for the nudge!