Talking about dust bunnies is like a taboo.
You don’t want to think about them, speak about them or acknowledge their presence. However if you haven’t change your vacuum bag in a while, the dust bunnies you’ve collected have been multiplying and growing. Although they may look like harmless hair and dust, studies show that bacteria, mold, and other organism are lurking.
Hair and dust are great sources for bacteria and other organism to leach onto. Remember in 8th grade science class when you collected samples from everywhere and swabbed it on a petri dish and the next day, it was infected with bacteria growth? The dark environment within your vacuum bag is also the perfect home for organism to multiply. On top of that especially with older vacuum cleaners, the suction from the vacuum could potentially return all the bacteria back into the air you breathe.