Line the cage with one to two layers of newspaper. If using disposable bedding, add two to three inches of shavings. Use the dustpan to spread it evenly throughout the cage and to pack it down so that the guinea pigs have a level floor to walk on. Step2 If using fleece bedding, stack two to three layers of towels, mattress pads or puppy pads over the newspaper. These layers will catch the guinea pigs' urine after it soaks through the fleece. Lay the fleece on top and secure it with binder clips or bricks. Step3 Replace igloos, toys and food dishes. Reattach the water bottles and fill the hay rack with fresh hay. Place guinea pigs back in the cage and watch them explore their freshly cleaned surroundings

Srouce: E-How