Disinfecting leather watch band

When cleaning away mold from a old piece of unfinished leather I intend to use for a watch strap I had no ballistol so I first cleaned with warm water let dry then wiped it down with alcohol and let dry. That had looked like it did the trick but a few weeks later traces of mold again showed up.
I then Wiped with alcohol and let soak in alcohol for a hour or so, then put the square of leather on the hood of the car on a very hot sunny day. After an hour or so I moved the leather to the dash of the car with the windows up and left it there for several days, turning it over now and then. No sign of mold returning in the year or so since then.

Easy. Buy a new one.

Just put the beater back on it's metal bracelet and do like the professor said for chrissakes.

Thanks. This is something I had in mind to ask.