Have been using fleece bedding from GP Market for about 2 years. Noticed its still wicking fine but its the urine smell is so bad even right after putting in cage after wash. How long does bedding last? Perhaps the U-haul materials are decaying? I have 2 guinea pigs in C&C Cage (2x4 grids) with TWO layers of absorbent lining fleece. The beddings are change every 5 days.