Why Does Vape Juice Turn Brown

Have you ever had your vape juice change color? When this happens, many assume that this is a sign that the e-liquid has expired. But that may not be the case.

If a consumer doesn’t go through their bottles quickly, over time, the liquid can turn into a brown or deep amber color that can feel off-putting.

Instead of making the mistake of throwing away a product that can still be useful, let’s go over the science behind the change and how to prevent it from happening again.

My Bottle of Vape Juice Turns Brown

You just bought a brand new bottle of vape juice, and you are enjoying the flavor.

Over a few days, you continue to bring the e-liquid everywhere you go because you don’t want to be empty-handed when it’s time to refill the tank.

During this time, you keep leaving it in the warm car and before you know it, what was once clear, is now a dark e-liquid.

Why did this happen? Oxidation.

If e-liquid is left in an unstable environment, exposed to oxygen or direct sunlight, it can cause the nicotine to oxidize—hence why it changes into a different color.

It’s important to note that oxidation is a normal process of aging vape juice, and the more nicotine in the product, the darker it will become. But by making some changes, you can extend the life and color of your e-juice.

Tips to Prevent Vape Juice From Darkening

Although you can’t entirely prevent your juice from changing over time, there are ways to slow down the process.

Try Not to Travel With It And Keep It Sealed

A common mistake is not closing your lid tightly enough. This may sound redundant, but unless you want oxygen to sneak in, make sure to seal it as tight as possible.

Next, don’t travel with your juice unless you have too. Moving in and out of unstable environments can greatly affect the chemicals. If you have to bring it with you, it’s best to keep it out of sunlight and in a location at room temperature.

Store It Properly

Speaking of temperature, the ideal environment for longevity would be in a cool, dark place. If you plan to use your e-liquid over a short period, a cabinet or drawer will suffice.

For long-term use? Put it in the fridge. The fridge is the ideal storing condition, as it can prevent bacterial growth and sustain the color much longer, keeping the integrity of the juice intact.

By placing it in the fridge, you risk flavor changes and consistency, but it is worth it if you don’t plan to fill your tank often.

Don’t Mix Juices

Please, we beg you. Do not mix juices. Even if you have two bottles of the same brand and flavor, they cannot be together.

Not heeding our advice could result in oxygen contamination, which won’t just ruin one bottle; it will negatively affect both.

Quality Matters

If you buy cheap vape juice, you likely will have a product that will not only brown but may cause other adverse effects to your vape, or worse, your health, which is why you should look into Hometown Hero’s line of e-juice.

Each bottle contains high-quality ingredients to ensure our customers have the perfect balance of taste and smoothness. All of our products are handmade in the U.S. and thoroughly tested for quality.

Our online store carries over 15 delicious flavors that offer you a different experience. Place an order with us today, and not only will you receive top-quality products, but a portion of your purchase will be donated to veteran charities.

Why is My E-Liquid Turning Brown in Tank?

Oxidation happens quickly after your e-liquid is in your tank, but that isn’t the only variable that alters the color.

In fruity and sweet tasting e-liquids, there can be artificial sweeteners and sugar that add to the flavor.

Once your juice is in your tank and heats up, the sugar will start to caramelize and change the texture and color of your e-liquid. And after a few sessions, you will begin to notice discoloration in the liquid, coil, and cotton.

There is nothing wrong with continuing to vape during this state. However, after a while, this substance will turn into a sticky gunky mess.

When this happens, it’s a sign that you need to clean your tank and replace your coil.

Unfortunately, the only way to avoid having your e-juice turning brown in the tank is by replacing the liquid frequently or only using juice that is sweetener-free.

Is E-Liquid that Changes Color Safe?

We totally understand why you may be hesitant about using an e-liquid with discoloration, but should it be thrown away? Of course not.

Don’t fall into the trap of tossing a perfectly good vape juice because it changed color. Unless the liquid is extremely dark, you can still safely use it.

Instead of feeling weary about the change in your juice, remind yourself that oxidation is a natural chemical reaction that does not affect the taste or overall vaping experience.


Your vape juice turning dark can be an annoying occurrence. But with the information you now have, you can combat the oxidation process by following our tips. Just remember to clean your tank frequently and avoid mixing e-juices to ensure that your tank doesn’t get clogged or drastically change color again.

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