We have tried everything in our guinea pig cage from Carefresh paper bedding to Aspen wood shavings to homemade fleece liners to custom fleece liners. We find fleece liners to work best for our family and our guinea pigs. But how to keep the cage clean and smelling fresh? The truth is you will never completely eliminate the smell and mess, but you can definitely reduce it. Here are our top 5 pro tips to keep your guinea pig fleece bedding smelling clean and fresh: