After I draw my own blood, I don't do anything, I ain't gonna get anything I ain't already got.

When I get a used razor I usually treat it first with a water and soap wash. Then I coat it in a chemical cleaner strong enough to eat rust and tarish right off (MAAS). then it gets scrubbed with a mild abrasive untill a mirror finish is achieved. At this point it is again cleaned with soapy water. Then as a final sterilization step I grind off the old cutting surface and replace it with a fresh one. After this is done the razor is cleanied again, this time with rubbing alcohol, then mineral oil and put into use.

After this entire process I doubt anything will survive.