NO! NO! NO! DON'T go near a celluloid handle with a hair dryer.

Celluloid can warp permanently with the kind of heat a hair dryer puts out.

And there is no need. This is a perfect example of overkill.

A razor will NOT rust at the pivot if you just take ordinary precautions:

1. Rinse the razor in hot tap water for 5 seconds, then dry it lightly. Pass a tissue between the scales if you got the whole razor wet. The residual heat in the metal will evaporate any water, even around the pivot pin.
2. Lay the razor down in a dry area, and rinse out your brush, cup, and apply your aftershave.
3. By now your razor is dry. A dab of oil on it won't hurt. Then put it away.