Feeder insects?

I feed my tarantulas almost exclusively on crickets. I read about the importance of a varied diet, but I fear feeding something I catch outside to my pets for fear of pesticide/parasites. I've tried mealworms on occasion but most of those escape and burrow into the substrate and I worry about finding a beetle munching on my molting tarantulas. When I lived in Texas, I could go to pet stores and buy feeder roaches. I was in charge of my university's insectary so I even started my own American cockroach colony that I fed to our tarantulas, scorpions, and centipedes. But now I live in Florida, where all the space I have is in my apartment (where I'm not technically supposed to have tarantulas..SHHH!) and feeder roaches seem to be a big no-no. So what have you used to vary your pets' diets?

I feed my crickets 2 weeks before they end up as dinner.
Differnt kind of insects is nice but not a must.
I catch grasshoppers and moths from outside.
Right know was the season of the easter hoppers, I have a full jar, they are great feeder insects to.
I don't use any kind of burrowing or flying bugs, I do use baby ants when flushing an antmount.
They are the best food for the realy tiny Slings.

anyone have any experience with superworms or mealworms. i don't what to feed my t stuff from outside due to chemicals playing a factor where I live.

I never tried worms, from what I know they are pretty rich in fats.

I've tried both. They work fine if the tarantulas are really hungry and jump on them at once, but if not they burrow into the substrate and disappear. I had a rosehair that would even dig them up if they didn't get too deep, but that was before she decided to stop eating for months at a time. I had trouble with the superworms burrowing into the cork bark I had in my pinktoe cage. My main concern is what happens when the worm digs down, pupates, and comes up as a large hungry beetle at the same time your tarantula decides its molting time.