how can i get rid of the smell of rabbit pee?

 
How can i get rid of the smell of rabbit pee?
please help me my dad got me 2 bunnies but their pee stinks and i dont want to return them and my parents hate the smell help me!!!!! plz dont suggest a product they dont work suggest something like baking soda thanks 4 your time! :).......????
answer:
try a different bedding that may help absorb the smell more or maybe even feed them a different type of food so there pee will smell different. btw baking soda can be used lol
Are they inside pets? My rabbits pee stinks also. but i give her a bath to keep her clean.I clean her cage every second day and if she pees on the carpet i just clean it with water. it does a good job.
Good Luck (: