For example, a couch that smells like a household animal, a stuffed animal having that “grandma” smell, or a carpet peed on and not properly cleaned: it seems like these sorts of smells seep into the object and become nearly impossible to remove economically. You can mask smells with air fresheners, but those usually fade, and they just impart their own opinionated odor to the object. What about odors makes them so inherent to an object over time?
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I believe it has to do with how porous or not much of our surroundings and the objects within our environment may be. The more porous the more likely to absorb and maintain the odor introduced to it.
Items made of less porous materials such as glass don’t often carry or hold odors within them once they’re cleaned very well.
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