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Below you will find a list of the most ‘Frequently Asked Questions’, simply click the expand button to reveal the answer. If there is a more specific question that you have that isn’t answered on this page then please use the form below and we will answer you forthwith.

First things first... You’re going to need a STARTER KIT. This includes the charger for the battery, the battery (bottom bit) and a clearomizer (top bit).

The clearomizer has a coil or head which heats up the e-liquid, creating vapour. Every 2 weeks on average (depending how often you use the unit) this coil or head will burn out. You will be able to either taste the burn, or it will eventually stop creating vapour. In the majority of our clearomizers this coil or head can be replaced, saving you money on buying new clearomizers.

Now the e-liquid, with all the flavour and percentages it can seem a little confusing, but we assure you it isn’t. As with food and drink, you’ll never know which one is for you until you try it. However, Banana Ice, Black Out, Carascotch and Blueberry Jam Donut are popular choices which never seem to disappoint.

The percent is the amount of nicotine in the e-liquid. For example 1.8% = 18mg. Our 1.8% is based on a 20 per day smoker. For those who would like a little more we have 2.4%, and for those who would like a little less, we have 1.2%, 0.6% and 0.0%.

We understand this can all be a little overwhelming, if you still need a little help, please do not hesitate to contact us and we are always more than happy to set you up!

MARVELOUS! Let’s get you vaping!

Best thing to do first is to charge up your battery, quite like when you get a new phone, the batteries come partly charged. Simply take the charger and attach this into a USB port on a laptop or computer. Then take the battery and gently screw it onto charger. The charger light will go red and then to green once fully charged. Please be aware the batteries must be charged using the provided USB charger in the starter kit.

Whilst that is charging you can prepare the clearomizer (top part). All our starter kits come with bottom filled clearomizers. To fill, you need to hold the clearomizer upside down, having the mouthpiece pointing to the floor. Next, unscrew the ridged base (where the coil sits) away from the plastic barrel; place the base to one side. Next step, adding the liquid, tilt the unit to a 45 degree angle then pour the e-liquid into the side barrel, avoid getting it down the central tube. Once filled attach the base back on and turn the clearomizer upright to let the liquid soak into the coils.

Once your battery is charged, assemble your unit!

Every battery has a lock and unlock safety feature. The batteries will come locked. To activate your battery press the main button 5/6 times rapidly. Once unlocked the button will flash. Hold the button down (the light should be solid) and inhale. If the button flashes, this indicates the connection is made too tight, or it still needs charging. When pressing the button down you are making a connection with the coil to heat up the liquid, this will make a crackling sound, which shows its working!

Everyone is different! Some people like to puff away all day and other people like to stick to their designated ‘vaping’ breaks. As a rough guide, an average 20 a day smoker of traditional cigarettes gets through a 10ml bottle every 10 days or so.

The strength of e-liquid needed correlates with the number of tobacco cigarettes smoked per day

If smoking in excess of 20 per day then 2.4% is advised.

If smoking around 20 per day then 1.8% is advised

If smoking around 10 per day then start at 1.2%

If you are using an e-cig to help you stop smoking then reducing your e-liquid strength to 0.6% can be achieved within 3 - 6 months of vaping if desired.

We suggest having one clearomizer for your tobacco e-liquids, one for your menthol e-liquids and another for your fruits.

You can use the same clearomizer for different flavours but bear in mind that there will be a little crossover for the first few hours.

There are several different types of clearomizers to choose from, all of which are amazing. Please see our ACCESSORIES page to see what we stock.

Depending on what clearomizer you have, you either need to fill it by unscrewing the mouthpiece 'top filled' (CE4 and CE4 V3), or it will be 'bottom filled' (Fuse, VPro, Lumina)

To fill a 'top filled' clearomizer with e-liquid, simply unscrew the black mouthpiece and tilt the unit to a 45 degree angle. Then simply pour the e-liquid into the barrel. Avoid getting it down the central metal barrel (as this may cause it to leak). Do NOT over fill it.

To fill a 'bottom filled' clearomizer, turn the clearomizer upsidedown with the mouthpice pointing to the floor and unscrew the metal base from the bottom. Then while holding the clearomizer at a 45 degree angle, pour the e-liquid around the tube in the middle. The e-liquid should be poured into the 'outer chamber' only, otherwise the clearomizer may leak. Put the base back on and turn the clearomizer upright. Let the e-liquid soak into the coil for a few minutes.

When most people think of an electronic cigarette, they think it’s ‘like smoking’. In fact, there is no ‘smoke’ involved, merely water vapour.

The term ‘vaping’ and ‘to vape’ is merely describing the action of using an electronic cigarette. If you enjoy vaping, you might even call yourself a ‘vaper’.

With so many different e liquids in our range as well as our ‘guest’ juices, it may feel a little daunting. The simple answer is, that as probably the cheapest purveyors of e-liquid on the planet, just try them all and decide for yourself which ones you prefer!

You will ONLY find our COF branded e-liquids available on our website and in our North Walsham store, if you find it advertised anywhere else then they are pulling your plonker and we’d appreciate it if you send us the URL link so we can sue the arse off them!

Our ‘Guest’ e-liquids though that are available on our site, are available elsewhere!

The short and sweet answer is: You set the temperature you want the atomiser to run at versus selecting the voltage or power output of the mod. This means that when you press the power button the e-cig mod monitors the temperature and intelligently adjusts the power to keep the coil at the desired temperature and maintain it.

If your clearomizer is running low on liquid, it may 'dry burn' as the head is not fully saturated. Simply keep your clearomizer topped up with e-liquid to avoid this happening.

If your clearomizer is topped up with e-liquid, you may need to replace it.

Depending on your day to day schedule it is normally worth having a spare in rotation. Check out our BATTERIES & CHARGERS page to see a selection of what we produce and stock.

The UK Cabinet Office published a report in 2011 recommending that electronic cigarettes should become more widely available in the UK as they are preferable to using traditional tobacco products.

- E-liquid is also known as liquid, juice or e-juice.
- It produces the water vapour.
- It comes in a variety of nicotine strengths and flavours and often consists of 4 ingredients: Nicotine, Water Base liquid (PG – Propylene Glycol), PEG 400 (Polyethylene Glycol) or VG (Glycerine)

- The most common base liquid is PG
- PG (Propylene Glycol) is often used as a food additive (E1520)
- The flavourings in e-liquid are the same as food flavourings, but some have been specially created for vaping.
- Try and store your e-liquid out of direct sunlight.
- You can even mix two or more flavours together to make some new blends.

All depends how often you use it? On average, a clearomizer lasts 1-3 weeks. However, many people use the same clearomizer for months without a problem.

You’ll know when to change it because it will start to taste a little burnt and/or will stop producing vapour.

Log in to your COF Account via the Log In icon at the top right hand of the screen. When you put items into you basket, you'll see your Reward Points on the right hand side (need guidance from Jack on how this works).

Vegetable Glycerin (VG) e-liquid is a thick, slightly sweet liquid that produces luscious clouds of vapour. VG e liquids deliver less of a throat hit. A minority of users complain about a build-up of phlegm in the throat.

Propylene Glycol (PG) e-liquid is much thinner and produces more of a throat hit than VG – this simulates the feel of smoking more authentically.

However, PG e-liquid may cause sensitivity in some users. We would then recommend using the VG e-liquids instead.

If it’s not producing any vapour your clearomizer/cartomizer may be empty. Replace your cartomizer and fill your clearomizer with e-liquid.

If you try to vape without any e-liquid, it could burn out your clearomizer which could permanently damage it, making it unusable.

Cartomizers last on average 1-3 days, so if your cartomiser stops producing vapour, simply replace your cartomizer.

If your battery is running low on charge then this will affect the vapour production.

Using a steady long draw versus a quick sharp draw should produce a better vapour.

We have two options for delivery, first class or second class. Choosing first class obviously costs more but you will get your products usually the next day if ordered before 4pm. Second class all depends on how busy the posty is! We email you when your product has been shipped.

This can sometimes happen if the clearomizer has flooded, the cartridge overfilled, or if the e-cigarette has been drawn on too hard. However, the number one cause is keeping your e-cigarette upside down or putting pressure on the clearomizer by keeping it in your pocket. We suggest keeping it upright at all times to ensure that the liquid is always kept below the top printed line on the clearomizer.

E-liquid may taste bitter so rinse your mouth out with water if this occurs. Use a paper towel to mop up any excess liquid you can see on and around the e-cigarette and make sure it’s as dry as possible before trying to use it again. Please be rest assured that small amounts of e-liquid will not have a negative impact on your health.

Electronic cigarettes do NOT contain tobacco so they do not burn in the same way as traditional cigarettes. They do not produce ash, carbon monoxide, benzene or any of the other dangerous by-products which result from burning tobacco.

The vaporization process produces no smell or residue. People nearby do not face the passive smoking dangers that are associated with traditional cigarettes.

Scientific research carried out so far has concluded that electronic cigarettes are substantially less harmful than traditional cigarettes. One study has concluded that the risks are equivalent to those of using nicotine patches. City of Fog electronic cigarettes are not for the use of those under 18 and they should always be kept away from children. They are not recommended for women who are pregnant or breast feeding.


If you have a specific question that isn’t answered above, then submit your question via the form, or alternatively join or COF Facebook group and join in the conversation online.


The COF facebook group where we discuss flavours, hardware, likes and wants for future COF liquids.



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Electronic cigarettes may contain nicotine which is addictive. Electronic cigarettes are products intended for use by a person 18 years and over. Electronic cigarettes are not recommended for persons who are allergic/sensitive to nicotine, pregnant or breastfeeding women, persons who should avoid using nicotine products for medical reasons, or persons with an unstable heart condition as they could be hazardous to health. Keep electronic cigarettes out of reach of children.

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