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How to apply anti-fog spray to glasses

Updated: 16 October 2026

You sprayed once, the lens went oily, and it fogged faster than when it was clean. That is usually too much liquid, or a swim step used on spectacles. How to apply anti-fog spray to glasses depends on the bottle: a cloth kit is wiped until dry, and several mask products are spread and then rinsed. This page is those steps, not a ranking. The Products Compared editorial team wrote it on 16 October 2026 from maker notes and the reviews behind the [anti-fog spray comparison](/hub/occupational-safety-accessories/anti-fog-spray-glasses), with no laboratory test. A qualifying purchase can earn us a commission at no extra cost to you.

You sprayed once, the lens went oily, and it fogged faster than when it was clean. That is usually too much liquid, or a swim step used on spectacles.

Our top picks

Cressi Cressi anti-fog gel

Best overall

Cressi Cressi anti-fog gel
9.0/10about £10.31
View offer
ZEISS ZEISS Anti-Fog kit 15 ml

Rank 2

ZEISS ZEISS Anti-Fog kit 15 ml
9.0/10about £6.99
View offer
Arena Arena anti-fog spray

Alternative

Arena Arena anti-fog spray
8.2/10about £9.50
View offer
On this page
  1. 1.Two methods, not one
  2. 2.Spectacles and a cloth kit
  3. 3.Goggles and masks
  4. 4.When the film has failed
  5. 5.Follow the bottle you hold

Two methods, not one

Read the label before you touch the lens. One family is wipe-until-dry. ZEISS tells you to clean, spray and rub with the kit cloth until the surface is fully dry. SO No Fog, which is not in this set, says wait 30 to 60 seconds, then wipe. Neither tells you to rinse. The other family is spread-and-rinse. Stream2Sea reviews that stayed usable put a drop on each inner lens, spread it and gave a light rinse. Cressi bullets say spread the product inside before the lens is wetted. Rinsing a ZEISS coat fights Bollé Safety UK's note that washing can remove a spray film. Zoggs comments describe a gooey coat when steps are skipped, and Arena comments describe instant fog when the spray was too close.

Spectacles and a cloth kit

Start with a lens free of dust and grease. ZEISS's UK note says use a lens cleaner first, let that dry, then apply the anti-fog. One or two sprays are the dose. Spray both sides and rub with the kit cloth until the lens is fully dry. The listing pairs the 15 ml bottle with a 13 cm microfibre cloth. A paper towel leaves fibres in a film that is still wet. The ZEISS sequence is rub until dry. If the lens looks smeary, buff again with the dry cloth and do not add a second heavy spray. Recoat about every 72 hours, which the listing calls two to three days. Rain or a glasses wash can take the film off sooner.
Cressi Cressi anti-fog gel

Testsieger

Cressi Cressi anti-fog gel
9.0/10about £10.31
View offer

Goggles and masks

Arena's UK page says spray the inside from about 20 cm, with no rinse and no wait. That page also states about 35 ml and about 150 applications, figures the amazon.co.uk listing omitted. Reviews that failed did so when the nozzle was too close and the inside was soaked. Cressi and Stream2Sea follow the rinse. A dive review sprays, waits briefly and rinses, and that dive stayed clear for about 60 minutes. One UK Stream2Sea review reports streaks when the rinse was skipped, and links that first use to an eye infection. That is one review, not a measured rate. The ZEISS 72-hour claim is the wrong duration once you are in the water.

When the film has failed

Pool water on a keep-dry coat strips the layer you just put down. A wet cloth or a glasses wash can lift a ZEISS-style film. Wipe the failed coat off, let the lens dry, and apply a small fresh dose of the same method. Do not stack a second puddle on the first. Stop if your eyes sting or your vision blurs. Use only the fluid the eyewear maker names on a work lens. If the goggles leak, fix the seal before the next coat.

Follow the bottle you hold

If the label is wipe-until-dry, use one or two sprays and rub with the kit cloth until the lens is dry. If the label says rinse, use a small amount and rinse. If it is Arena on goggles, spray the inside from about 20 cm and leave it. A step copied from another brand smears the lens.

Common questions

Do I spray both sides of spectacles?
On the ZEISS kit, yes. Spray both sides and rub with the kit cloth until the lens is fully dry, after a lens cleaner has dried. One or two sprays are the dose. A swim or dive bottle often goes on the inside only. Read the label before you coat the outer lens.
Should I rinse swimming goggles?
Only when that bottle says so. Arena's UK page says spray the inside from about 20 cm, with no rinse and no wait. Cressi and Stream2Sea reviews that stayed usable spread a little and then rinsed. Rinsing a wipe-until-dry spectacle film can remove it.
Why is the lens smeary?
The usual cause is too much liquid, or a cloth that stopped while the surface was still wet. ZEISS wants the kit cloth rubbed until the lens is dry. A paper towel leaves fibres in that wet film. On a rinse product, a skipped rinse leaves streaks. Buff again, and do not add a second heavy spray.
How long do I wait before wiping?
Match the wait to the bottle. SO No Fog, which is not in this set, says 30 to 60 seconds, then a microfibre wipe. The ZEISS sequence is rub until dry. Arena's maker page says no wait. Cressi dive reviews wait briefly and then rinse. A pause copied from another brand turns a thin dose into a puddle.
Can I use a paper towel?
Not on the cloth-kit method. The ZEISS listing pairs the 15 ml spray with a 13 cm microfibre cloth, and the steps assume that cloth rubbed until the lens is dry. A paper towel leaves fibres in a film that is still wet. If the kit cloth is missing, use a clean microfibre.
How often do I reapply?
On the ZEISS kit, about every 72 hours, which the listing calls two to three days. Rain or a wash can end it sooner. Swim products are session films. One Zoggs title says about 10 minutes, and a rinsed Cressi dive stayed clear for about 60 minutes. Do not borrow the 72-hour line for a goggle. If your eyes sting, stop.

Related pages

Anti-fog spray buying guide

Best anti-fog spray

Anti-fog spray for swimming goggles

Anti-fog spray for glasses

Anti-fog spray for safety glasses: mask and N mark

Sources

Sources named in the research digest. Page updated 16 October 2026.

  1. ZEISS Vision Care UK, AntiFOG kit (retrieved 16 October 2026)
  2. HSE, PPE supply (retrieved 16 October 2026)
  3. HSE, L25 Personal protective equipment at work (retrieved 16 October 2026)
  4. legislation.gov.uk, PPE Regulation Annex II section 2.3 (retrieved 16 October 2026)
  5. legislation.gov.uk, PPE at Work Regulations 1992 (retrieved 16 October 2026)
  6. JSP Safety, misting and the N mark (retrieved 16 October 2026)
  7. BSI protective eyewear brochure (2025) (retrieved 16 October 2026)
  8. arena UK, how to look after your swim goggles (retrieved 16 October 2026)