It really is no problem.

I use springtails and woodlice in all of my vivs,
not only with small darts but with large tree frogs as well.
I even use it in the terrarium of my Chameleon,
helps me clean up the poo and fallen leaves.
Just an ecological way to clean up the mess

I only clean my viv when there is to much on the bottom,
but that is more a lack of balance in the tank.
When you have enough space for the amount of frogs,
critters that clean up and life plants.
Everything may balance out.

The frogs eat (maybe the critters cleaning up), they poo which will be converted to nutritions for the plants, the plants will take this up to grow.
When you get this into balance, it will safe a lot of time cleaning up your'e viv.
This way you won't have to disturb youre frogs to often as well,
Causing them to stress out less.