How to Keep Synthetic Urine Warm

Most employers use urinalysis for drug testing, and this may be behind the rising demand for synthetic urine in recent years. However, to use the product successfully, it is crucial to use it properly.

Why Keep Synthetic Urine Warm?

Because initial drug screening does not usually come with a special test for a the validity of a sample, the testing staff simply checks the urine’s temperature to ensure that it hasn’t been substituted. Human urine is warm by nature, which means your synthetic urine sample should also be warm, or the testing staff may decline it, believing it’s fake. Of course, getting caught also spells trouble with the person or organization that required the testing, not to mention with the facility itself.

Normal Human Urine Temperature

Normal human urine temperature is about 94F to 96F warm. The temperature of a drug test sample is taken within the first 4 minutes after being received by the staff, as ambient temperature can cause changes anytime later. The acceptable range is between 90F to 100F; if the sample falls outside of this, it is automatically considered suspicious.

Heating Synthetic Urine

The following are common methods of bringing synthetic urine up to temperature:


Microwaving synthetic urine is the easiest method of increasing its temperature by far. Just put the container inside a microwave and let it stay for around 10 seconds. A temperature strip comes in handy when it comes to checking the usability of the sample. Remember that too much heat can destroy it, so don’t leave it in too long. The properties of natural human urine can no longer be restored even as the sample’s temperature decreases.

Hand Warmers

Hand warmers are much smaller and more readily available, so they’re Generally considered a better alternative to the microwave. Just put the liquid in a small container and tape the hand warmer around it. Hand warmers aren’t all created equal however. Buy one that maintains heat in the 90F to 100F range for as long as necessary.

Your Body

You may not have to look far – your own body can be your most effective synthetic urine warmer. After putting the sample in a sealed plastic bag, tuck it inside your underwear or in your inner thighs. Some women will put it in their bras or under their armpits.

Practice Is Key

Finally, before actually showing up at a testing facility with your synthetic urine, don’t forget to practice, practice, practice. You should know what you have to do and how you can do it best so as not to appear suspicious. The more you practice, the more relaxed you will and the more likely you can pull this off.

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