They already put those in the roof. I don’t think it’s really worthwhile putting them anywhere else because only the bathroom and toilet have any kind of cut out in the roof for the extractor/exhaust fans, so the smell is largely prevented from escaping anywhere else
It might be worth getting some of those moisture absorbing things you leave around the house just to make sure.
Or a cheaper alternative might be some baking powder and apparently coffee beans are good for absorbing smells too
They already put those in the roof. I don’t think it’s really worthwhile putting them anywhere else because only the bathroom and toilet have any kind of cut out in the roof for the extractor/exhaust fans, so the smell is largely prevented from escaping anywhere else