Simple Effective Atomizer Cleaning
The carbon build-up from burnt e-liquid (& flavours & other additives eventually cause a strong bad 'burnt' taste when vaping.
So I far have tried various treatments:
hot water, detergent, alcohol, powerful sonicating bath, coca-cola (weak acid),
concentrated acid, concentrated hot caustic ... and some combinations.
None will remove all of the built up carbonised e-liquid/flavour/colourings on the coil & wick,
Some give a short-lived 'freshen' to the taste, but it quickly comes back (e.g. Coke),
some clean/dissolve the deposit better, but have other problems like leaving residues in the metal mesh (e.g. caustic).
Here's an easy, cheap, safe & practical cleaning method that actually works:
Get some 30 vol (9%) hydrogen peroxide (see note 1)
e.g. from Boots the Chemists (UK) - over the pharmacy counter, 90p for 200 ml.
1 Blow the excess e-liquid out of the atomizer, rinse in hot water & blow out excess water.
2 Run the atomizer to dryness & then red heat (see note 2)
3 Keep it running & drip some hydrogen peroxide as close to the coil/wick as possible, one drop at a time,
use a plastic pippete of glass dropper maybe, let it fizz between drops (it decomposes to just water).
4 When you've done this say 10 times, drip quicker to flush it a bit & turn off the power.
6 Wash in hot water, blow excess out.
(7 if you've got a hand held steamer with nozzle, it might be worth using it here to give a final clean)
8 drain and/or dry out a bit (see note 3).
Use it again.
Note 1 : used as a skin disinfectant & mouth wash. so no real danger here.
Still it's best not to get hot peroxide on your skin, you might get a white patch.
Note 2 : problem here for automatic batteries, how to activate withou t sucking on it yourself (!),
I guess use some sort of suction device (hoover, or maybe a rubber sqeezie-bulb as sold in aquarium shops).
With manual batteries or some external power supply (see note 4) this is a lot easier.
Actually this step may not be necessary at all.
Note 3 : don't dry the wick out too much, or it won't soak up e-liquid very well for a while.
Note 4: In the below demonstration I used a switchable voltage supply with 3V, 4.5V (and others),
1.2 amp current-limited, bought from Argos for £10, the jack plug happens to touch the atomizer battery contact-end quite nicely.
Visual demonstration of cleaning an extreme case, click on any picture to enlarge it:
Test liquid was a worst case mixture : 4ml 36 mg liquid + 1ml Loranne Coffee (thick opaque black) + 1 ml Loranne Peppermint oil.
Brand new dissected atomizer, you can see the shiny 'primer' on it:

After vaping a millilitre of so (I wasn't inhaling this btw, but the room smelt very nice),
extreme carbon build up !

Burn off by heating the coil (this was with 4.5V, the e-cig battery probably wont get it so hot)

After burn-off:

hydrogen peroxide boiling on the coil:

Not too bad a result, thee coil is clean, & the wick is clean under the coil.
The ends of the wick are still a bit dirty, but I don't think this matters too much
(it might in the long run, if it stops it actually 'wicking' eventually)

This is an extreme example, and of course prevention is better than cure, so doing this as frequently as possible
would keep the build up to a minimum (say at least once a week?).
The hydrogen peroxide leaves no residue and also seem to clean & de-colourise the metal wick parts nicely.
Any other tests I should perform?
Here's a quick vid to show it happening for real on an intact atomizer:
YouTube - e-Cigarette Atomizer In-Place Clean Using H2O2
(There's some extra details in the 'details' section for this vid on YouTube proper)
The carbon build-up from burnt e-liquid (& flavours & other additives eventually cause a strong bad 'burnt' taste when vaping.
So I far have tried various treatments:
hot water, detergent, alcohol, powerful sonicating bath, coca-cola (weak acid),
concentrated acid, concentrated hot caustic ... and some combinations.
None will remove all of the built up carbonised e-liquid/flavour/colourings on the coil & wick,
Some give a short-lived 'freshen' to the taste, but it quickly comes back (e.g. Coke),
some clean/dissolve the deposit better, but have other problems like leaving residues in the metal mesh (e.g. caustic).
Here's an easy, cheap, safe & practical cleaning method that actually works:
Get some 30 vol (9%) hydrogen peroxide (see note 1)
e.g. from Boots the Chemists (UK) - over the pharmacy counter, 90p for 200 ml.
1 Blow the excess e-liquid out of the atomizer, rinse in hot water & blow out excess water.
2 Run the atomizer to dryness & then red heat (see note 2)
3 Keep it running & drip some hydrogen peroxide as close to the coil/wick as possible, one drop at a time,
use a plastic pippete of glass dropper maybe, let it fizz between drops (it decomposes to just water).
4 When you've done this say 10 times, drip quicker to flush it a bit & turn off the power.
6 Wash in hot water, blow excess out.
(7 if you've got a hand held steamer with nozzle, it might be worth using it here to give a final clean)
8 drain and/or dry out a bit (see note 3).
Use it again.
Note 1 : used as a skin disinfectant & mouth wash. so no real danger here.
Still it's best not to get hot peroxide on your skin, you might get a white patch.
Note 2 : problem here for automatic batteries, how to activate withou t sucking on it yourself (!),
I guess use some sort of suction device (hoover, or maybe a rubber sqeezie-bulb as sold in aquarium shops).
With manual batteries or some external power supply (see note 4) this is a lot easier.
Actually this step may not be necessary at all.
Note 3 : don't dry the wick out too much, or it won't soak up e-liquid very well for a while.
Note 4: In the below demonstration I used a switchable voltage supply with 3V, 4.5V (and others),
1.2 amp current-limited, bought from Argos for £10, the jack plug happens to touch the atomizer battery contact-end quite nicely.
Visual demonstration of cleaning an extreme case, click on any picture to enlarge it:
Test liquid was a worst case mixture : 4ml 36 mg liquid + 1ml Loranne Coffee (thick opaque black) + 1 ml Loranne Peppermint oil.
Brand new dissected atomizer, you can see the shiny 'primer' on it:

After vaping a millilitre of so (I wasn't inhaling this btw, but the room smelt very nice),
extreme carbon build up !

Burn off by heating the coil (this was with 4.5V, the e-cig battery probably wont get it so hot)

After burn-off:

hydrogen peroxide boiling on the coil:

Not too bad a result, thee coil is clean, & the wick is clean under the coil.
The ends of the wick are still a bit dirty, but I don't think this matters too much
(it might in the long run, if it stops it actually 'wicking' eventually)

This is an extreme example, and of course prevention is better than cure, so doing this as frequently as possible
would keep the build up to a minimum (say at least once a week?).
The hydrogen peroxide leaves no residue and also seem to clean & de-colourise the metal wick parts nicely.
Any other tests I should perform?
Here's a quick vid to show it happening for real on an intact atomizer:
YouTube - e-Cigarette Atomizer In-Place Clean Using H2O2
(There's some extra details in the 'details' section for this vid on YouTube proper)
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