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Old 02-04-2020, 01:43 PM  
Salem13
Hamster Pup
 
Join Date: Dec 2019
Location: Canada
Posts: 111
Default Re: Hamster peeing in his cardboard house

Cardboard is basically made of paper so you really can't "clean" it. Once the urine dries the smell just becomes a part of it. You'll have to either throw out the house or cut the bottom off.
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