I Got My Vacuum Filter Wet: What to Do
If your vacuum filter got wet, do not run the vacuum until it is fully dry. Air-dry for 24 to 48 hours in a well-ventilated area. If the filter is washable per the manual, you can rinse and dry. Foam filters survive wetting; HEPA pleated filters often do not.
Causes, ordered by likelihood
- Accidental spill. Vacuum knocked over near liquid, or wet shoes on a stored canister.
- Vacuumed liquid. Tried to pick up liquid with a non-wet/dry vacuum.
- Bathroom storage humidity. Less common, but high humidity can saturate a filter over time.
What to check at home
- Remove the filter immediately.
- If it's a foam pre-motor filter and the manual says washable, rinse and squeeze.
- Place on a towel in a well-ventilated room for 24 to 48 hours.
- Do not use a hair dryer; the heat warps the filter media.
- Once fully dry, smell it. If musty, replace it.
- Do not run the vacuum until the filter is back in and dry. Running without the filter can pull dust into the motor housing.
When to bring it in
Bring it in if you vacuumed liquid and you're worried the motor got wet. Internal motor moisture can short the windings. We can inspect and dry the motor properly.
Call (703) 931-6100 Walk in to the shop
Brand-specific notes
- Miele
- AirClean HEPA filters (SF-HA50) are not washable. Replace if wet.
- Dyson
- V-series post-motor HEPA filters are washable per manual. Air-dry 24 hours minimum.
- Shark
- Most Shark filters are washable. Air-dry overnight.
Common questions
- Can I dry a wet filter with a hair dryer?
- No. The heat warps the pleated media. Air-dry only.
- Can I run the vacuum with the filter removed?
- No. Without the filter, dust enters the motor housing and accelerates wear. Wait until dry.
- Will running a wet vacuum break it?
- Yes, in two ways: the motor windings can short from moisture, and the wet media gets sucked into the motor cone.