After shave I clean and dry.
Then back in the razor.
Except the hi-tech blades.
Cartridge and AC are stored in a oil bath.
Adding stropping, It makes them last way longer.
Hundreds for cartridge, over fifties for AC.
It stays in the razor unless it is no good for another shave, or it is an expensive or rare blade I'm using (I put these in oil in the hope of maximising their life)