ive read some other posts and read the 'white stuff' indicates some fatal disease, oh well. i wish i'd checked the large mass in the spiders moth the other day to see if it was actually food or something more sinister (ie nematode mass, i could then correlate that with the white paste). i remember seeing several live caught spiders with this paste years ago amongst several hundered live spiders (recent captives).
If this proves fatal and moves to other spiders it looks like i'll be giving up on blondi as these animals prove too expensive to keep losing. I'll be looking at keeping the us desert spiders at room temps in their own isolated containers, rather easier than having lots of spiders close in a heated tank.