How to defog a bathroom mirror

How to defog a bathroom mirror

There can be nothing more frustrating than trying to use your bathroom mirror after your morning shower, only to find it’s completely misted up. Whether needing to use the mirror to floss, shave, or moisturise, you can find yourself with the same annoying task of having to use your towel to repetitively wipe down the glass, or opening the bathroom window and shivering, as you wait for the fog to clear.

So how can you defog a bathroom mirror? What are the best ways to do it quickly, and how can you keep it from fogging up? That’s where we aim to help.

Defogging your bathroom mirror quickly

When you’re in a bit of a rush or running late after showering, aside from opening your bathroom window and braving the cold, there are different ways to defog your mirror quickly:

Running Cold Water

Before you have a hot shower, try running it on cold for about 30 seconds. This will help keep the surrounding area cool, so that fog won’t form as quickly. Bear in mind, though, that fog will form eventually, so try to keep your shower short. Also, run the shower on cold water for longer if you have a small bathroom, as it will fill up with steam faster.

Cover the Mirror

Covering your bathroom mirror with a towel before you have a shower is a quick and simple way to prevent fogging. The draped towel will protect the mirror from collecting moisture during your hot shower and keep your mirror fogless. If your mirror hangs on the wall in a way that’s difficult to cover, try using putty to hold up the towel.


One method to quickly defog your mirror is to use a hairdryer after your shower. This works because the heat from it will evaporate the fog. It’s best to set the hairdryer to a low heat and aim it directly at the glass for maximum effect.

Keeping your mirror from fogging up

To stop your bathroom mirror from constantly fogging up after a shower, there are different household items, many of which will be in your bathroom, which can help.

They include:

Shaving cream

For those of us who shave (or have partners that do), this can come in very handy to defog a mirror. Just apply the shaving cream to the surface of the mirror and then wipe it down with a paper towel. The residue from the shaving cream will act as barrier to the condensation and stop the mirror from misting up. This method can even keep your mirror steam-free for several weeks. 


Just pour some shampoo (double the amount you’d use to wash your hair) on a folded paper towel and wipe it over the mirror. Then take another paper towel and use it to wipe the mirror dry. It’s important to make sure the glass is dry, or you’ll end up with a blurry mirror. When you next have a shower your mirror should be fog-free.


Before you take a shower, lightly run a bar of soap over the mirror so that it covers the whole surface. Try not to rub the soap too hard, or it will obscure the glass. Also, use a cloth to remove any soap residue. Doing this should keep your mirror fog-free following your shower, and even after a couple of glass cleans. 


Using this involves creating a 50-50 solution of vinegar and water. Pour the mixture into an old spray bottle and add a couple of drops of dishwashing soap. Then spray the solution onto your mirror and wipe with a cloth. You can either leave the glass to dry or wipe it down with another cloth. In doing this, your bathroom mirror should be free from fog for a couple of days.

When stepping out of the shower to your now defogged bathroom mirror, what could be better than standing in front of one that’s, well, rather fancy? At Pebble Grey we have a range of luxurious mirrors to choose from. To take a look at what we offer, visit our Designer Mirrors page.