Haha, I used to have the same problem, because they poop ALOT! xD
(And I only have 2!)
Every evening when ive just got them in from their playpen outside, I just keep them in a cat carryer for like 5 mins (I use it to take them from my room to the garden and back) and I have a dustpan and brush in my room, I sweep up the most pooey areas, and just replace it with fresh woodshavings, they only use 2 of the corners really, you dont have to pick up ALL the poo, just if they use a certain few places alot more than others, then clean those. then I give them food, and hay and stuff.
for the bedding, try and fluff it up as much as possible, and use hay with it, they like to lie in a bed of hay, with some soft bedding too.
Timothy or meadow hay is best (They arent brands, theyre type of hay)
I do that every few days,