I’ve been using the same multi-blade cartridge for weeks. There’s no need to throw one away after just a few uses.
When you’re shaving and the blades start to pull, run the face of the cartridge down your arm in the opposite direction you would use it to shave. Do this ten times. It is like stropping a straight razor. The cartridge blades will be refurbished and sharp again. This can be repeated over and over, each time the razor gets dull, saving you a ton of money on cartridges.
I’m with you on that. I had one blade (four blades) last me two years a while back. I have a “fine” beard. In fact, I actually replaced one of my blades after several weeks with a new blade and I could tell no difference.
I have six four-packs of blades now from Dollar Shave club. I cancelled delivery. I’m 65. I think I have enough blades to last me the rest of my life.