I would put the whole frame in a steam wax melter. If you don't have one of these cut out the wax and run a blowlamp over the frame to melt the remaining wax and hopefully kill off any remaining mould. I wouldn't reuse mouldy wax but would replace it with foundation.
its some frames that got damp (my fault) and its the pollen that has mould, I was wondering if thymol would clean/kill the mould off rather than having to melt them down?