wow, each to their own when it comes to assessing what risks one is prepared to take, but I nearly shit myself (really!), when I read about ISO in the microwave!!!
I don't presume to know any better. But I do wonder about the build up of fumes in there with all that energy? Even low, low, low what about the circuitry? Sounds like the makings of a bomb!
So what's the story VW? Is the air/vapor extraction in the microwave actually pretty good? I think mine seems to have a fan, but dunno if it extracts well- seems to get steamy in there sometimes.
..........
Edit: re-reading it seems it's still in the sealed bottle when you microwave it? So that would contain the fumes?
Also; don't know if it makes much difference, but my microwave doesn't actually vary the power output
per se, rather the duration instead. I can tell because it interferes with one of the TVs in my house. On full power the interference is constant, on half power there are pulses of full strength RF interference about 5s on, 5 sec off maybe. And at the lowest power they are short infrequent pulses of power- 3 seconds on perhaps, followed by maybe 10 seconds off (at a guess). What I'm wondering is whether this pulse method of heating actually has a larger degree of risk than a more controlled output strength/level? If anything did go wrong with the microwave the result would likely be either full power or no power hitting the ISO. And you wouldn't really know. But if the actual microwave output level was limited then the only risk is to overcook the ISO for too long a duration.
Hmmm I know what I mean, but not sure if I've made sense. Sunday wake and bake I'm afraid