I would advise not to change so often because when you change the bedding, the hamster lost his scent on his stuff therefore it started marking again. The more often you change, the more it will mark therefore causing worse smell.

How big is your cage and how much bedding do you use? You can clean it weekly or bi weekly if there's more bedding.

Is your hamster male or female? Does it smell strongly of pee or it's scent?

Have you toilet trained your hamster?
Whenever people say that hamsters are smelly is because of their pee
Toilet train them and they won't be
I used to keep my hamster in my bedroom no smell at all because he was toilet trained and I cleaned his toilet twice a day

Don't change the bedding and clean their house too often
I'm sure you wouldn't like people coming into your room and messing up your place do you?
It causes stress and anxiety in them.
If you notice, hamsters usually groom themselves when you return them into their cage after you clean them.
Hamsters groom for two reason
One: to keep clean. hamsters are extremely clean animals
Two: to deal with stress and anxiety