[CannisterFlux]

Nah, there's no need to alcohol/dry DE blades. They're all made of stainless steel nowadays and don't rust. That advice was maybe from 100 years ago when they were made of carbon steel. You're more likely to dull the blade by accidentally hitting something with its edge (hopefully not your finger) if you take it out of the razor.

As for changing every other shave, I guess it depends on beard and razor. I have a Merkur 34C that tugs like mad whatever blade I use, new, old, in-between, they're all as bad. And an Ikon slant thing that feels like you could use a piece of paper in it and it'd work wonderfully. I go about 60-70 shaves before I can tell the razor might be getting a bit dull in that one.

[silisili]

Feather ASD2. I have extremely thick face hairs, like little wires. Which I find odd, because my head hair and arm hair and such are very fair, thin, soft. It's also a different color...blond vs some copper color(now half gray).

With a new blade, it feels like rubbing a wand on my face. By the 4th shave, it feels like a tiny metal man is plucking each hair from my face. Especially painful in the mustache area.

[XorNot]

I feel your pain, I think I get a reliable 1-2 shaves from a new blade before wanting to change it. My neck pays the price if I don't.