How does that help? The alcohol will evaporate off rapidly leaving the cleaned metal exposed to the air which contains moisture.
Back when I shaved with a razor, I'd store it in a cup with baby oil. Did work to keep it sharp longer.
This works wonders for preservation (both sharpness and rust). You can also sharpen them by running it backwards on an old strip of denim a few times before each shave.
Purely a guess, but I'd say the alcohol rinses away the standing water on the blades, leaving only the airborne moisture to deal with.
And how did you keep the blades from being clogged up with hair? Usually, they just stick in there, even if I try wiping them off before they get to that point.
Run hot water through both ways (flip the razor while rinsing). Hold the razor at an angle, so that the water runs straight through the blades. Do this after every 2-4 strokes to prevent hair build up, and give you a nice warm, clean razor each time it touches your face. (Mach 3 user for as long as I can remember.)
This is actually why I use the 4x dollar shave club razor instead of the 6x. There are gaps between the blades so you can actually rinse it.