[DaleHCook]

It is important to understand the purpose of each chemical, what it should be used for, and what it should not be used for.

I use a variety of chemicals in my work as a chief engineer for radio stations, including:

DeoxIT D5, G5, and F5
91% Isopropanol
Denatured alcohol (use with caution - some denaturing additives may attack plastics or other materials)
Naptha

I sometimes have to use strong chemicals for cleaning, such as removing black smoke stains from the aluminum inner walls of radio transmitter RF cavities. That calls for volatile (and very flammable) chemicals such as acetone or lacquer thinner. Those require gloves, a respirator, and an exhaust fan. The latter is invariably present in a radio transmitter building, for use when the air conditioning fails.