+1 to all the above. I've never read or heard anything saying a razor needs to sit up like that. It's only steel and that would be like telling a soldier he can't shoot his gun for a day or two after firing a shot. LOL! Even though steel is affected by temperature changes & such, I don't think the hot and cold water from your tap is enough to worry about. As a matter of fact, I'm willing to bet the steel in a blade has finished doing whatever it's going to do in less than an hour after shaving with it when it reaches ambient temperature.

As I understand it, even though the edge of a blade appears smooth, it looks more serated under a microscope. Each one of these little serations gets a little out of wack from each shave and needs to be re-aligned. Stropping is what re-aligns and polishes these little serations. I read a good article written by one of the old razor manufacturers that talked about stropping before and after each shave. Stropping before a shave polishes the edge and gets it as keen as possible. The razor's edge can get a little oxidation along the edge that can't be seen by the naked eye. Stropping after shaving helps dry the blade from the friction. For the better part of my str8 razor shaving career, I've been stropping 20 linen & 40 leather before a shave then 15 linen & 30 leather after a shave. Since I've been doing this, I have never had a water spot appear on any of my blades and my razors shave really well every time.