Brilliant. At what point do your clothes get hot enough to ignite? Is it heat or the action of the infra-red waves that kills them? Does it kill the eggs as well? This does sound like a brilliant idea though. Thanks.
The microwaves come from a magnetron on the top or side of the cavity. Any part of the contents very close to it gets a much higher dose than the rest of the contents. The idea some have that it "cooks from the inside out" is inaccurate. The waves do penetrate, but some of the energy is absorbed as they pass through things. The denser the material, the more is absorbed. The more absorbed, the hotter that material gets. So, if the furthest stuff from the magnetron gets enough, what's close to it gets much more.
For both radiation and sound, there is the "inverse square law" saying that the intensity received is inversely proportional to the square of the distance. So if something is twice as far, it gets one-quarter of the intensity; if 3.16 times as far, it gets one-tenth of the intensity. Turn that around and … if it is one-third as far, it gets ten times as much radiation!
The moral of the story is that if you squeeze too much stuff into a microwave, synthetics will melt and cotton will burn. (And metal will possibly reflect enough radiation back into the magnetron to blow a fuse that requires disassembly to replace!)
If you think you have bugs, ask a hospitalero for help. At our place, we would loan the pilgrim some clothes and launder all of theirs at 60°C. Or you could do it yourself at a laundromat in a larger city.