Fleece - Guinea Pig Cages

I was wondering if you had any tips on litter training your piggies, because your cage looks so incredibly clean! My piggy still hasn't caught on, she just thinks the litter box is an obstacle to pee and poop around! thanx, and the cage looks really nice!

Thank you everybody!

Kiwi is living alone until the number of pets I have go down because vet care is expensive and Kiwi is fine for right now.

Litter training is just a matter of picking up poops and putting them in their box and putting the box where they go poop/pee the most.

The ramp is two bend grids with linolium and a towel on top.

About the litter training, do you try to correct them as you do with a dog, for example, or do you just let them do it? also, I am still a little apprehensive about the fleece because I could see my 3 pigs peeing all over it. how often do you have to wash the fleece?
by the way, great cage!