@Maverick: lol, don't worry. Store-bought crickets still have plenty of diseases. Anything living in such close quarters will have disease and parasites. I'd recommend that you get more experience with caring for frogs before you try w/c feeders (I actually don't recommend w/c at all, but definitely not at this point for you). That way you have a better idea of what can be harmful, and you'd be able to spot and fix problems more quickly.

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Well, I'm vegan, so I'm probably full of pesticides from all the store-bought vegetables I consume... lol
Really though, most pesticides are surface-sprayed and are not absorbed into the plant. You can get rid of the overwhelming majority by thorough washing. Which is what you should do before giving any to your feeders.

LOL Anyone who thinks mass feeder suppliers feed their crickets veggies is living in a fantasy world! They feed them a dry, processed, nutrient substance that looks a lot like cardboard, is cheap, and can store for years. So, no, they probably aren't exposed to more pesticides than anything you find outside.

Okay... Who has neighbors that spray herbicides on their driveway? Who has neighbors that may wash their dog outside, washing the soap and flea powder into the grass? You think a grasshopper can't eat something in your neighbors yard then fly 20 feet into your yard? We're not just talking about heavy-duty agricultural pesticides. For goodness sake, we tell people to wash their hands before handling their frogs so that nothing we've gotten on our hands on a daily basis can harm them.
It's just... not accurate... to pretend like there is no chance the bugs in their yard have come into contact with something that can harm their frog. Yes, if you're in a particularly rural area, or especially careful about what you harvest you might get lucky for a very long time. Maybe whatever is on the bugs isn't enough of a concentration to harm your frog. But the bottom line is that the risk of chemical contamination is always there, and it is not there for most store-bought feeders. It's your choice to take that risk, but pretending that it isn't there is just misleading to others.