Cricket,
I had thought about the poop thing and I actually dump the crickets into a container by themselves, then I sift out the poop(!) am I obsessive or what? LOL! 
I like your idea of a salt shaker but I had read/heard (not sure where other than Rep-Cal's label) that once combined the vit A (beta carotene) degrades. I do re-use but only once or twice, though I am now re-thinking this...
btw, I ude the Cal w/D3
lele
>I don't reuse mine. Mainly because there's always a little cricket poop in it afterwards, and I don't want to feed my animals yesterdays cricket poop. I don't know how anyone else does it. I also use Rep-Cal calcium w/D3 and Herptivite. I mix them with Sticky Farms Indoor Miner-All in a huge salt shaker. This makes it easy for me to shake out only what I need.
>>Hope this helps.
>> Cricket
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0.1 veiled - Luna
0.2 green anoles Jaida & Jetta
0.1 brown anole - Jamaica
0.2 house geckos - Gaia & Tia
0.2 felines - Kyndra and Líta