Ethanol may work for some stuff, but don't assume it's safe for everything. It does attack acrylics AFAIK.
I'll reiterate that one shouldn't over-lubricate. Some parts shouldn't be lubricated at all, like the shutter blades (although some advocate for dry lubricants on them). If you open an old service manual, you'll see that they advise several different lubricants for different parts. One may get away with just two, a thin oil and a grease, as I have so far, but it's probably not ideal wrt long-term wear.