Start with a dirty cage	Roll up bedding and newspaper lining.	Throw away
Sweep up remaining bedding	Spray with a solution of 50% white vinegar & 50% water and wipe dry	Put at least 4 layers of newspaper down (overlapping slightly) all over cage
Add fresh bedding (aspen or carefresh)	Spread to form an even layer 2-3 inches deep	Replace cage accessories

Notes: vinegar is a piggy safe, cheap disinfectant that really removes urine deposits in the cage.