You bought a home air monitor. The number goes up, the number goes down. What does it actually mean – and when should you do something about it? Key Takeaways Your air monitor is a change detector, not a chemistry lab – it tells you “something shifted in the air,” not which specific chemical is…

Ionizer air purifiers and Himalayan salt lamps have been fixtures of the wellness market for years. The pitch is consistent: they emit negative ions, the air feels fresher, particles drop out of the space. Some devices add ozone to the promise — described as “activated oxygen” or “nature’s purifier.” The underlying physics is real. Ions…

Key Takeaways Probiotic cleaners use spore-forming Bacillus bacteria that germinate on surfaces and produce enzymes to break down grease and organic residue The mechanism at work is competitive exclusion — when beneficial bacteria colonise a surface, they slow how quickly other microbes recolonise after cleaning Evidence from hospital settings is solid; evidence from ordinary home…

The dark spot appears behind the wardrobe in late January. The bedroom window starts weeping overnight. The corner of the bathroom ceiling looks faintly grey and you are not sure whether it is dirt or something growing. Usually there is a straightforward physical explanation: somewhere in the room, a surface is cold enough that the…

Air · Guide Key Takeaways CO2 concentration is a practical proxy for how well your space is ventilated — but it is not a general indoor air quality indicator, and a single reading does not translate directly to a health verdict There are two fundamentally different types of CO2 sensor: Non-Dispersive Infrared (NDIR) sensors measure…

Air · Guide Key Takeaways Most air purifier buying guides focus on picking a product. This one focuses on sizing it correctly, verifying it works in your room, and understanding the ongoing cost — because a well-chosen purifier you run every day beats a premium model that sits in the corner. For particles (dust, pollen,…