Here in Western Australia, wax dipping is done in a mixture of equal parts of microcrystalline wax and paraffin wax at a
temperature of 160 real degrees,  (ie Centigrade NOT Fahrenheit!!!). At this temperature,10 minutes immersion is required to kill
the spores. Dry heat at around 200 degrees centigrade was used for many years by one commercial beekeeper here (now deceased) to
kill AFB spores.Our state government Agriculture inspectors were very sceptical so tested the results and method very carefully.
Happily they were able to confirm that it did result in 100% kill. But this is not a technique for the faint at heart!!! (Smoke,
fumes and high fire risk).

Peter Detchon