How to Clean and Maintain Your DREO 338S Air Purifier for Longevity
By DREO Home Ecosystem | Air Comfort, Smart Kitchen | Published: 2026-09-21
Category: How-to Guides
Keep your DREO 338S running smoothly by following these easy cleaning and maintenance steps, from filter care to exterior upkeep.
Quick answer
For peak performance, wipe the exterior weekly, clean the pre‑filter monthly, and replace the aroma pad or HEPA filter as recommended.
Regular upkeep of your DREO 338S air purifier ensures it captures allergens, dust, and odors efficiently while extending the unit’s lifespan.
This guide walks you through practical, step‑by‑step cleaning tasks that fit into a busy schedule and avoid common pitfalls.
Why regular maintenance matters
The 338S uses a multi‑stage filtration system that includes a washable pre‑filter and a high‑efficiency HEPA filter. Over time, dust and particles clog these layers, reducing airflow and forcing the motor to work harder, which can shorten the device’s life and increase energy use. Keeping the filters clean preserves the advertised 99.97% capture rate and maintains the unit’s quiet operation.
In addition to the filters, the outer housing and sensor panel accumulate fingerprints and airborne pollutants. A dirty exterior not only looks unsightly but can interfere with the built‑in PM2.5 sensor, leading to inaccurate readings and sub‑optimal auto‑mode decisions. Simple weekly wiping prevents buildup and keeps the smart features reliable.
- Tip: Use a soft brush for the pre‑filter to avoid damaging fibers.
Step‑by‑step maintenance checklist
- Power off and unplug: Disconnect the purifier from the outlet and turn off via the app or button. Avoid electric shock and protect the motor.
- Clean the pre‑filter: Remove the washable pre‑filter, tap out loose dust, then rinse gently with lukewarm water. Let it air‑dry completely before reinstalling. Common mistake: re‑installing a wet filter reduces airflow.
- Wipe exterior and replace accessories: Use a microfiber cloth slightly damp with mild soap to wipe the housing and control panel. Replace the aroma pad if scent is faded. Check that no moisture reaches the sensor openings.
Related accessories you may need
- Air Purifier Aroma Pad For 338/338S Black/White: Compatible with DREO Air Purifier for 338/338S Black/White (DR-HAP008/DR-HAP008S, Black & White) Adds a pleasant scent while the unit runs, and can be swapped during routine cleaning to keep fragrance fresh.
- Air Purifier HEPA Filter For Macro Max AS: Compatible with DREO Smart Air Purifier Macro Max AS Black/White (DR-HAP003AS Black/White). Not compatible with the Macro Max S series (DR-HAP003S), which requires a 3‑in‑1 replacement filter. Illustrates that filters are model‑specific; using the correct filter ensures 99.97% particle capture for optimal air quality.
By following these straightforward steps, your DREO 338S will continue delivering clean, fresh air and operate efficiently for years to come.
