Happy Birthday Valido!
To the OP: As you know by now, you really don't have to get rid of your cartridge after just one shave. I'm pretty sure that even our 'friends' at Gillette would agree that you can and should be getting several shaves from a cartridge.
I use one razor for my head and a different one for my face. I shave every other day and I change blades every two weeks.
Also learning how to sharpen your blades against your palm may help to make them last a bit longer.
I know I am just repeating a lot of what has already been stated by the sly brethren, I just wanted to chime in with a Happy Birthday for Valido without hijacking the thread!
