[shard]

People don't seem to be aware of this, but most of the dulling of disposable razors are due to it staying wet. If you dry your disposable razor after use, shaking out the water then drying it on a towel, it can last much much longer. Going down to shaving 2-3 times a week due to WFH, I think I made one disposable razor last about a year. If this pattern keeps up, this pack of razors I bought from Costco is going to last until I retire.

[ddingus]

Leaving it wet is a big contributor to dullness for the reasons you gave here.

I would add accumulation of crap between the blades being the rest of the story.

A small blast of air gets that crap out and leaves the shavings path clear for next time.

[woleium]

or just store it in a glass of oil. you loose the libricating strip, but the oil more than makes up for that.