What should texture of compost in the bin be?

My compost is quite moist and dense - beautiful for pots and garden, but I'm not sure if this is healthy for the worms (I've read how this doesn't allow enough oxygen into the dirt?...). Should it be looser/fluffier? When I add food I try to mix the dirt with a hand trowel so that it's not so compact, but I'm afraid of killing the worms, so is there a different tool or way to do this? Thanks!

use a garden fork. i just bought a cheapo from the dollar store.

I use a turkey lifter four-prong fork that I got at a yard sale....