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Expert Guide

How to Clean and Maintain Your Air Purifier

MaintenanceHow ToMoney Saving

How to Clean and Maintain Your Air Purifier

James D.

Written By

James D.

updateLast Updated: Feb 15, 2026
schedule5 min read
How to Clean and Maintain Your Air Purifier

The Hidden Cost of Dust

An air purifier is a vacuum cleaner for the air. Just like a Dyson loses suction when the bin is full, an air purifier loses airflow when the pre-filter is clogged. Running a clogged machine wastes electricity and puts strain on the fan motor, potentially shortening its lifespan.

Step 1: The Pre-Filter (Every 2 Weeks)

Most modern units (like the Levoit or Winix models) have a mesh or fabric "pre-filter". This catches the big stuff—hair, lint, and large dust bunnies. **Do This:** 1. Turn off and unplug the unit. 2. Open the back panel. 3. Vacuum the mesh pre-filter gently with a brush attachment. 4. If it is washable (check manual!), run it under cold water and let it dry completely (24hrs) before putting it back. **Never put a wet filter back in the machine.** It will grow mould.

Step 2: The HEPA Filter (Do Not Wash!)

The white, pleated paper filter is the HEPA. **Do not wash this.** Water will ruin the delicate fibers instantly. Some brands say you can vacuum it gently to extend its life, but once it turns grey/black, it is done. You must replace it. Using an expired HEPA filter is like drinking water through a dirty sponge—at best it slows flow, at worst it releases pollutants back into the air.

Easy Maintenance

Easiest to Clean

Levoit Vital 100S Smart Air Purifier
star4.7

Levoit Vital 100S Smart Air Purifier

The Levoit Vital 100S is designed specifically for easy maintenance. The pre-filter is washable and pops out without needing tools, making it perfect for pet owners who need to clean it weekly.

Coverage

52 m²

Running Cost

£39 / yr

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Maintenance FAQs

My filter light is blinking but it looks clean?expand_more
The light is just a timer. If the filter looks white, reset the light (usually hold the button for 3s) and keep using it.
Can I wash the carbon filter?expand_more
No. Washing activated carbon ruins it. It must be replaced.
How do I know if it needs replacing?expand_more
If the airflow seems weak even on high speed, or if the filter smells funky (sour/sweet), replace it immediately.

Summary

Spend 5 minutes every fortnight vacuuming your pre-filter. It will make your main filter last longer and keep your energy bills low.

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