Kleaner is a herbal liquid detox spray that freshens your breath and skin for around an hour after use — the same window that conveniently covers most roadside saliva swabs. This alcohol-based formula from the French brand Kleaner combines plant extracts that neutralise residues on the tongue, gums and skin, giving you a clean slate when it matters most.
Why Kleaner is the saliva swab insurance people actually buy
Kleaner is the most-asked-for saliva freshener on our counter, and the reason is simple: it covers the window that matters. Research on oral fluid testing confirms these products are a real category: according to Fabritius et al. (2013), "since the implementation of mandatory drug testing in drivers' oral fluid, several solutions to avoid an onsite positive result can be found on drug user forums" (PubMed 24453092). That's the field Kleaner sits in — and people buy it year-round.
What makes it different from a breath spray or mouthwash? Standard mouthwashes freshen. Kleaner's herbal extracts go after the bacterial film where residues sit. According to a 2022 review on oral microbiology (PMC8751028), mouth rinses can measurably shift the oral bacterial population that holds onto volatile compounds. Kleaner uses that mechanism on purpose — and extends it to the skin, where sweat carries the same story. A good reference point for harm-reduction context on roadside oral fluid testing is the EMCDDA's drug-driving overview, which maps where these swabs are actually used across Europe.
You get roughly a one-hour window of cover after a single dose. That's long enough for the awkward 15 minutes at a checkpoint, not long enough to keep you clean all evening. Plan accordingly.
Which Kleaner variant should you pick?
| Variant | Size | Best for |
|---|---|---|
| Single dose (6ml) | One-shot sachet | Festival pocket, glove compartment, one-off use |
| Normal (30ml bottle) | Liquid with dropper | Regular users, deeper oral cover, best value per ml |
| With spray | 30ml spray bottle | Quick discreet top-ups, topical application on skin |
If you're buying once for a specific night, order the 6ml single dose. If you drive often and want peace of mind in the glovebox, the spray is the most practical. The bottle with dropper gives you the most precise oral dosing. From our counter: the spray outsells the other two formats nearly two-to-one, mostly to regulars who want something small enough to live in a jacket pocket.
How to use Kleaner properly
Use four to six drops in the mouth, swirled for around a minute, then spat out — that's the manufacturer's standard dose. Kleaner-branded instructions specify: "Orally: Ingest 4 to 5 drops. Topically: Pour 4 to 6 drops into the palm of your hand and rub on the neck, head, face."
- Shake the bottle before use — herbal extracts settle.
- Drop 4–6 drops directly into your mouth (or 2–3 sprays if using the spray variant).
- Swirl around your gums, tongue and cheeks for 30–60 seconds. Don't rush it.
- Spit out. Don't rinse with water afterwards — that washes off the active layer.
- For topical use: 4–6 drops in the palm, rub on neck, face, forehead and any exposed skin.
- Re-dose after roughly an hour if you're still in the at-risk window.
Specifications you get with every Kleaner bottle
Every format shares the same active herbal-alcohol base — only the delivery and size change. Here's what's in the bottle:
| Brand | Kleaner |
| Formats | 6ml single dose, 30ml liquid, 30ml spray |
| Base | Alcohol-based herbal liquid |
| Onset | 1–2 minutes |
| Duration | Up to 60 minutes |
| Oral dose | 4–6 drops, swirl 30–60 seconds |
| Topical dose | 4–6 drops on palm, rub into neck/face |
| Shelf life | 24 months sealed |
| Origin | France |
What to watch out for
Kleaner is a surface-level freshener with a short window — that's the honest headline. It is not a body detox, it does not clean your blood, and it won't help with a urine test or a hair follicle test. It works on saliva and skin surface residues only, and only for about an hour.
Mild side effects are rare but possible. According to general herbal mouthwash literature, reported effects include "dry mouth, slight drowsiness, gastrointestinal disorders" — all uncommon and short-lived. The alcohol base also means you shouldn't use it if you're avoiding alcohol-containing products entirely.
One more thing people get wrong: eating or drinking immediately after use shortens the window. Sip water if you need to, but don't down a coffee and a sandwich thirty seconds after dosing. Compared to a standard mint mouthwash, Kleaner tastes more herbal and less sweet — more "bitter tincture" than "supermarket mouth rinse".
Pairs well with a THC home test kit — handy if you want to check your own saliva before heading out, so you know whether you actually need the Kleaner in the first place. We also stock single-panel and multi-panel urine test strips for the more thorough types.
Frequently Asked Questions
How long does Kleaner last after you use it?
Around one hour from the moment you dose. The effect is strongest in the first 15–30 minutes and tapers after that. If you're still in the at-risk window at the 60-minute mark, re-dose.
Does Kleaner work against all substances?
It's formulated for saliva and skin residues from a range of commonly tested compounds. It won't affect blood, urine or hair tests — those draw from deeper biological reservoirs that a mouth rinse can't reach.
Spray or liquid — which one is better?
The spray is faster and more discreet, better for topping up on the go or applying to skin. The liquid with dropper gives you more precise oral dosing and is the format most long-term users prefer. Neither is weaker than the other — same active formula.
Can you feel it working?
You'll taste the herbal-alcohol formula for a minute or two — slightly sharp, slightly bitter, a bit like a strong herbal tincture. After that, nothing. No numbness, no aftertaste beyond a clean mouth.
Is the 6ml single dose enough for one use?
Yes — 6ml covers one oral dose with a little left over for topical application on the neck and face. It's designed as a single-event product: glovebox, festival pocket, one night out.
Does Kleaner replace actually being sober to drive?
No. Kleaner freshens your mouth and skin for about an hour — it doesn't change what's in your bloodstream or what's affecting your reflexes. If you're not sober, don't drive. This is a freshener, not a reset button.
Where should I store my Kleaner bottle?
Somewhere cool, dark and upright. The glove compartment is fine short-term, but a hot summer dashboard will degrade the herbal extracts faster. For long-term storage, a drawer indoors keeps the 24-month shelf life intact.
Last updated: April 2026
