How "not' to kill mold spores, and the right way

[lugerholsterrepair]

350 degrees is a dangerous temperature to work with. I beg to differ. It has been tested and proven over the last ten years to be safe and effective used as directed. 350F will not ignite paper. 350F is what it takes to kill the encapsulated spores buried in the interior. The lessor temperature of 160 to 200 will erase the mold flowers..the stuff you see on the surface but you have to remember our mission..to KILL and further reduce another outbreak. A spray with 1/2 vinegar 1/2 water and a quick wipe should kill your spores. Should? The spores are NOT on the surface. They bury themselves..with a spray with 1/2 vinegar 1/2 water and a quick wipe you MISS all the parts you miss..it's unavoidable and IMO this solution is not a proven mold killer and eradicator. You can wipe with a dry cloth and wipe away the flowers. This too is inefective and may even be spreading the problem.
A spray solution is also liable to discolor or stain light colored leather..turn it splotchy. Even plain water will do this. So it's not anything I would do but I hesitate to discourage you from something that works for you.
My heat treatment has NEVER failed me. It has always worked with no damage providing the leather is left exposed, NOT enclosed.
One thing I will say about it though because I am a student and always wanting to learn. Mold does on occasion return. I cannot for sure attribute this to it migrating onto a clean holster or some spores remained alive? I have some holsters that seemingly you cannot keep mold off. Japanese holsters are particularly vulnerable.. Something about these attracts mold.