Another solution is the spray them with isopropyl alcohol. I do this with sandals if they ever start to smell. Works great. Smells for a bit while it evaporates but then it is fine.
Boric acid still makes nervous but it is completely safe?
Boric acid still makes nervous but it is completely safe?
It's not toxic otherwise. You need very high concentrations: lethal dose is 2.6g/kg. To put that in perspective, table salt is lethal at 3g/kg.