Freshy blog
Replacement schedules for every household item
Guides on how often to replace toothbrush heads, water filters, HVAC filters, sponges, pillows, razor blades and more, with the reasoning behind every interval.
Air purifier filter replacement: how often, and the signs it is due
HEPA every 6 to 12 months, carbon every 3 to 6, the pre-filter every few weeks. Why October is the month to check, and the signs the filter is spent.
Car cabin air filter: the yearly replacement almost nobody does
It costs little, takes ten minutes in most cars, and it is the difference between fresh air and a mouldy vent smell.
How often to change a razor blade, and why irritation is a blade problem
Most razor burn is a dull edge rather than sensitive skin. Ten to fourteen shaves is the honest number.
Your vacuum is not dying, its filter is: a six month maintenance cycle
Suction falls off long before a filter looks dirty. Here is the cycle for HEPA, foam and robot vacuum filters.
Smoke detector batteries and units: what to replace every year and what to replace every decade
Batteries annually, the whole alarm after ten years. The chirp you are ignoring is usually telling you which one.
When to replace pillows and a mattress: the fold test and the eight year rule
Two years for a pillow, about eight for a mattress, and two simple physical tests that beat both numbers.
How often to replace a kitchen sponge, and why microwaving it does not help
A damp sponge is the most heavily colonised object in a normal kitchen. Two weeks is the ceiling, and here is what actually reduces the load.
HVAC filter replacement schedule by MERV rating, pets and allergies
Why a single 90 day rule fits almost nobody, and how to build a schedule from filter depth, occupancy and air quality.
Water filter replacement: pitcher, fridge and under sink
Capacity is rated in litres, not months. Convert your household use into a date, and learn the signs a cartridge is finished.
When to replace a toothbrush head, and what happens if you wait
The 90 day rule, why splayed bristles matter more than the calendar, and how electric heads differ from manual brushes.
How often to replace household items: the complete schedule
One table covering bath, kitchen, home, auto and pet consumables, with the reason behind each interval and the factors that shorten it.