Why Do Bathroom Mirrors Fog Up While Taking A Shower

Why Do Bathroom Mirrors Fog Up While Taking A Shower? Severally, you will notice that after having a shower you realize that your bathroom mirror has been covered with tiny particles.

Those tiny particles are called fog and that they form totally on the mirror in your bathroom. Your bathroom mirrors are likely going to fog up once you have a shower.

Why Do Bathroom Mirrors Really Fog Up While Taking A Shower

Why Do Bathroom Mirrors Fog Up While Taking A Shower

When the circulating air within your bathroom is heated by the warmth of your shower, the air suspends the little drops of water until it is saturated and therefore the droplets fall to the ground. As these droplets are in contact with cold surfaces like walls, toilet, or mirror, they cool and they condense again in a liquid form, creating a layer of water on those colder surfaces.

Steam from the recent water, that is suspended within the air in your bathroom, condenses on cold surfaces, like the restroom mirror.

Once you have your shower, the small particles will be suspended by air within your bathroom. The warmer the water, the further apart its particulate substances are.

If your toilet is packed with enough steam and if your mirror is cold, you will notice that the mirror fogs up. If your mirror is far colder than water and also if there is a big amount of steam within the air there, you will notice the water droplets running down the surface of your mirror.

Your mirror fogs up because glass features a much higher heat capacity than air: In other words, the recent water within the shower heats the air around it faster than the air around the mirror. When the steam from the shower reaches the glass, it cools and condenses.

How to prevent your bathroom mirrors from fogging

Why Do Bathroom Mirrors Fog Up While Taking A Shower

If you have constantly noticed these fogs on your mirror, you can prevent them from forming using the following

  1. You can use your soap or shampoo to prevent your mirror from fogging up
  2. You can use a vinegar solution or glycerine
  3. Cold water can be used too to prevent your mirror from fogging up.
  4. Also, you can cover your mirror with a towel or use a cloth soaked in ammonia or dilute alcohol to wipe your mirror.
  5. There are anti-fog agents and systems that can be used to stop your mirror from fogging up.

Apart from the ideas above, you can buy a fogless mirror. These fogless mirrors work differently. They are made up of polycarbonate materials and then a hydrophilic coating that is applied to them and this works in the exact opposite way to the hydrophobic coating.

Rather than encouraging the water to stay, it prevents droplets forming and instead creates a really fine film of water so you see a fogless reflection of yourself, regardless of how hot the shower.

These fogless mirrors include:

Keonjinn LED Round Mirror


The Keonjinn LED round mirror has a bright light that is dimmable and controlled with a round touch button. It has a high quality, long-lasting and unique design.

It is easy to install and with the built-in anti-fogging functional, there is no need to constantly treat your mirrors with fog-free spray, or rinse them multiple times per shower.

Keonjinn Horizontal/Vertical Anti-Fog Wall Mounted Makeup Mirror with LED Light

Why Do Bathroom Mirrors Fog Up While Taking A Shower


Unlike the Keonjin LED round mirror, this one has two installation methods. It can either be installed horizontally or vertically depending on your need.

It is easy to install and also has a dimmable light and a unique design. It comes in a dimension of 30x28x16inches and it is long-lasting.

Krugg LED Bathroom Mirror

Why Do Bathroom Mirrors Fog Up While Taking A Shower


The Krugg LED Bathroom Mirror has an easy on/off touch sensor and a built-in defogger. It is easy to install and the LED light is energy saving.

With a defogging pad attached to the back, the mirror is heated gently and softly, hence you do not need to wipe it clean after a hot shower.

Reflexon Bathroom Mirror

Why Do Bathroom Mirrors Fog Up While Taking A Shower


The Reflexon bathroom mirror has a wall switch that can directly control the light. The mirror is equipped with a memory touch sensor.

This touch can control the light brightness. It also has colour temperature switching. The colour temperature switching can be selected at 3000K warm white or 5500K daylight.

It has a defogger which can be automatically turned on after the mirror is connected to the power supply. With this built-in anti-fogging function, it means that there is no need to constantly treat your mirrors with fog-free spray, or rinse them or wipe them after every shower.

How to Prevent Condensation in your Bathroom

Why Do Bathroom Mirrors Fog Up While Taking A Shower

As earlier mentioned, your mirror fogs up due to condensation of water vapours on them. This condensation of water vapours does not only lead to fogging of mirrors, it could as well cause the growth of mould in different locations of the bathroom.

Ventilation is essential especially in the bathroom where high levels of moisture are created. Air must circulate so as to prevent the build-up of moisture as a result of condensation of water vapours.

This condensation can be prevented using the following;

Use Extractor fans

The function of an extractor fan is to extract humid air and expel them outside of the house. Fresh air will take its place from another opening, preferably a window.

This is often against a typical fan that simply circulates air around the same space to make a breeze. The installation is done by professionals to avoid damage.

It can be installed in three certain areas, this can be through the ceiling, wall or window.

These bathroom extractor fans come in different shapes and there are various sorts of bathroom extractor fan on the market, each manifesting in several shapes and sizes. the specified extraction rate should be considered before making a purchase, and also the noise levels.

The main purpose of extractor fans is to exhume ‘bad’ air and stop condensation forming. The bathroom is, therefore, the first place where one is required.

As evident, when mirrors fog over, steam will rise after a hot bath or shower, meaning efficient ventilation becomes of paramount importance.

Likewise, an extractor fan will also get rid of unpleasant smells in the bathroom that might otherwise linger for extended periods.

Choose an extractor fan which may detect moisture within the air. The extractor will kick in as soon because it detects a certain amount of moisture within the air.

Quality extractor fans do come at a better price. Some of them come with extra features like timers, lights, moisture and humidity detectors, and silent motors.


Another solution to this may be a dehumidifier. A dehumidifier may be a bit sort of a vacuum cleaner but in this case, it sucks in air from your room at one end, takes the moisture out of it, then blows it back out into space again.

The moisture drips through into a set tank that you simply need to empty, from time to time. You can place your dehumidifier in a hidden location, which could ve behind your toilet. Dehumidifiers work by either refrigeration or absorption/adsorption.

Refrigerant dehumidifiers extract humidity from moist and hot bathroom air. They work in a manner that warm, moist air is sucked in through a grille on one side of the machine. An electric fan draws the air inward.

The warm air then passes over freezing cold pipes through which a coolant circulates. As this happens, the air is cooled, and then the moisture it contains turns back to liquid water and drips down off the pipes.

Now freed from moisture, the air passes over the recent condenser/compressor unit and returns back to its original temperature. Warm, dry air blows back to space through another grille.

The moisture that was within the air originally drips down into a collecting tray (or bucket) at the bottom of the machine.

Once the tray is full, the fan turns off and indicator light is switched on to tell you that the machine needs to be emptied.

When buying dehumidifiers, I will advise you to get silent ones to avoid the noise that will be generated from them.

Look at these dehumidifiers below.

DW&HX Electric Safe Dehumidifier


The DW&HX Electric safe Dehumidifier uses a standard 220v electrical outlet that removes about 60l of moisture per day.

With this, your bathroom is protected from condensation and excessive moisture. It works quietly with a noise that is lower than 37db and so it does not disturb your work, sleep or study.

It is perfect for use at night and a small space. It has a low-temperature operation and it saves energy and money.

DW&HX Energy Star Dehumidifier

DW&HX Energy Star Dehumidifier


This 1300ml Per Day Dehumidifier uses a Standard 220v Electrical outlet. It has a noise level 51db. It has a dual-use water tank and drain pipe.

The design includes a top handle, integrated side handles and caster wheels that make it easy to move your unit from room to room.

BlueDri BD-76 Commercial Dehumidifier

Why Do Bathroom Mirrors Fog Up While Taking A Shower


This dehumidifier is ideal for your bathroom, garage and also for water damage restoration projects. Its high-efficiency rotary compressor ensures the maximum moisture extraction and this can be up to 150 pints per day.

The BlueDri BD-76 commercial dehumidifier has an automatic water pump, digital panel, compact electrical control with auto restart, hour counter, RH and temperature sensors.

From your basement to your attic or your bathroom to outside in your garage, this dehumidifier will help you restore your whole house and prevent condensation and excessive moisture.

Open the doors and windows

Your windows and doors play a very crucial role in condensation in your bathroom. It is always advisable to leave the windows and doors of your bathroom open after a hot shower.

This will allow inflow and outflow of air so that there is reduced condensation of the hot air in the bathroom which will lead to moisture.

Once you do not have an extractor fan, it is better to leave your bathroom doors and windows open when the bathroom is not in use.

Also, remove any damp towels and hang them elsewhere in order that they don’t increase the moisture already within the bathroom.

Use Condensation-Reducing Paint

Sometimes you may discover that apart from your mirror, your bathroom ceilings and wall are also covered in moisture after your shower.

This is due to condensation and there are paints that when applied on your bathroom walls and ceilings, they can absorb moisture and prevent condensation. Some also contain anti-mould agents to assist prevent the formation of mould.

These paints can help absorb the moisture in your bathroom, hence preventing condensation.

Have a Cooler Shower

A simpler and cheaper approach to preventing condensation in your bathroom is for you to have a cooler shower.

You can reduce the temperature of your water and by doing so, your bathroom won’t get too hot and its air won’t hold too much amount moisture, thereby reducing condensation.

If you decide to continue with a hot shower, then you can decide to hasten your shower, so to prevent the hot air from circulating around the bathroom.

The longer your shower, the more the hot air will be circulated around the bathroom and this will lead to further condensation.

But when your shower time is shortened, the doors can be opened and there could be an exchange of air. This also works to reduce the condensation in your bathroom.

Have any comments or feedback, do well to leave them in the comments section.

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