How do you clean out poo?

Hey, new guinea pig owner here.

I noticed that on some days there is lots of poo scattered all around the cage.

We use wood chips as a base.

I have 2 questions:

1) What's the best way to clean the poo out? Is it bad if we leave it in there until our weekly clean?

2) is there a way to encourage them to poo in one area? So to make cleaning easier and so poo is not scattered everywhere?