Overkill.Resident germaphobe here.
I soak used razors in hot water and Dawn dishwashing soap for an hour or so followed by 15 - 30 minutes in Isopropynol and then 15 minutes in Barbicide. Rinse under running water and you're ready to rumble.
Just my opinion and YMMV.
Overkill.
Resident infectious diseases physician here. I wash with Dawn and water, using a toothbrush to scrub. Then I rinse it off and dry it.
When it's dry, I apply 70% rubbing alcohol and let the pieces air dry.
Then, load it up and go.