Vinegar or bleach for mould: which one for which surface
Use diluted white vinegar on small mould patches on tiles, grout, glass and window tracks. Use diluted bleach only on hard, non-porous surfaces where the label allows it, mainly to fade a stain. Never mix the two. Neither one fixes the damp that grew the mould, so the spots come back unless the room dries out.
Aurala is a Gold Coast business. Every wet season we see the same pattern. You bleach the shower grout and it looks perfect for a week. It looked clean because bleach takes the colour out. The bathroom still fogged up every morning.
After cleaning, run our First Light diffuser blend in a waterless diffuser in that room.
What each one does on contact
White vinegar is a mild acid. The Australian CDC lists 4 parts white vinegar to 1 part water for regular cleaning of mould-prone surfaces. It does not bleach towels or grout if it splashes.
Bleach is a strong oxidiser. It lightens the dark stain fast, so a wall looks clean sooner. CHOICE lists diluted vinegar as an alternative to bleach for spot cleaning. Follow the label on the bottle for dilution and surfaces.
What the sources do not say is that either one keeps mould away. That depends on moisture.
Surfaces for vinegar
- Shower tiles and grout
- Glass shower screens and mirrors
- Aluminium window tracks and sills
- Tiled splashbacks
- Plastic shower curtains (or wash them hot)
Not for natural stone such as marble or limestone. Acid can etch it. Full method: vinegar for mould.
Surfaces for bleach
- Hard, non-porous, colour-safe surfaces where the label allows it
- Stained grout where you accept the colour may lighten
Not for painted plasterboard you want to keep the same colour, carpet, fabric, timber or anything soft. Bleach may not reach mould inside porous material. More: why mould comes back after bleach.
Never mix them
Vinegar or ammonia plus bleach gives off toxic gas. Use one product, rinse the surface with clean water, let it dry, and only then use another. The CDC's general rule: do not mix cleaning products.
Before any clean, follow CDC protection advice: gloves, eye protection and a fitted P2 or N95 mask. Open a window and run the exhaust fan. Get professional help for large growth (CHOICE uses about 1 square metre as the line), water damage, or soft plasterboard.
After the wipe, hold the room: First Light, A$39.99
First Light is our six-oil blend of clove, litsea cubeba, tea tree, eucalyptus, peppermint and cedarwood. Lab tested: 99.2% on direct contact. See the lab test. See the lab test.
Why it is the next step and not a third bottle of cleaner: you have already cleaned the surface. First Light runs daily in a waterless diffuser, so it adds no water to a room that is already damp. 5 to 8 drops, 30 to 60 minutes a day.
Shop First Light | No diffuser yet? Get the Protection Kit, from A$79.98: our Waterless Diffuser with one, two or three bottles of First Light. Free standard shipping on Australian orders, with no minimum spend.
Stop the mould coming back in the room where it grows. First Light is six essential oils in one bottle: clove, Litsea cubeba, tea tree, eucalyptus, peppermint and cedarwood. Run it in a waterless diffuser every day. Lab tested: 99.2% on direct contact. From A$39.99 with free shipping Australia-wide.
Quick table: vinegar or bleach
| Surface | Vinegar | Bleach |
|---|---|---|
| Shower tiles and grout | Yes | Label allowing; may lighten grout |
| Glass and mirrors | Yes | Not needed |
| Aluminium window track | Yes | Not needed |
| Marble or natural stone | No (etches) | Check the stone supplier's advice |
| Painted plasterboard | Small patch, light spray, dry fast | No (fades paint) |
| Carpet, curtains, mattress | No | No. Clean professionally or replace |
| Inside shower silicone | Will not reach | Will not reach. Replace the silicone |
After the wipe: the part both skip
- Dry the surface fully with a clean towel.
- Run the exhaust fan after every shower until the mirror clears.
- Squeegee the screen and leave the door open.
- Run First Light in that room for 30 to 60 minutes a day.
- Check the same spot in 7 days. If it is back, look for a leak, a fan venting into the roof space, or a cold external wall. See why mould keeps coming back.
Use the diffuser in a ventilated room and keep the unit and the bottle out of reach. Directions: how to use and product use and safety.
Pick your cleaner for the surface. Then fix the room.
Vinegar or bleach gets the spots off today. A drier room and a daily routine keep them off next month.
Shop First Light, A$39.99 or get the Protection Kit, from A$79.98.
FAQ
Is vinegar or bleach better for mould?
It depends on the surface. Diluted white vinegar suits tiles, grout, glass and window tracks. Diluted bleach suits hard, non-porous surfaces where the label allows it, and it lightens stains. Neither stops mould coming back while the room stays damp.
Can I mix vinegar and bleach to clean mould?
No. Mixing vinegar and bleach releases chlorine gas. Use one, rinse with clean water, let the surface dry, then use the other if needed.
Does bleach kill mould on plasterboard?
Bleach can fade the stain on the painted surface, but it may not reach mould inside porous material such as plasterboard. Soft or stained plasterboard needs professional advice or replacement.
What vinegar ratio should I use on mould?
The Australian CDC suggests 4 parts white vinegar to 1 part water for regular cleaning of mould-prone surfaces.
What should I do after cleaning mould?
Dry the surface, ventilate after every shower, and run a daily routine in the room, such as First Light in a waterless diffuser. Lab tested: 99.2% on direct contact. See the lab test.
Ready to stop the mould coming back in the room where it grows? Get First Light, six essential oils in one bottle, from A$39.99 with free shipping Australia-wide. Lab tested: 99.2% on direct contact.
