How To Keep Synthetic Urine Warm For Your Urine Screening

image of keeping synthetic urine at the right temperatureStatistics show that up to 95% of employers prefer urinalysis as a pre-employment screening. It is this single piece of statistic that has probably affected the demand for synthetic urine positively over the years. However, the proper usage of the product is critical for success.

Why Do You Need To Keep Synthetic Urine Warm?

An initial screening does not typically involve a special test for the sample’s validity. Therefore, the testing staff simply uses the temperature of the urine sample to determine whether it has been substituted. Real human urine is body warmed which means that a fresh sample ought to be warm or otherwise it must have come from a source other than your body. This is the reason you must keep the fake urine warm if you do not wish for your sample to be rejected even before the test.

How Warm Should A Sample Be?

The normal temperature of human urine ranges from 94°F to 96°F. The testing staff must measure the temperature of the sample within the first 4 minutes upon receiving it since it changes depending on the ambient temperature. Normally the acceptable temperature range is from 90°F to 100°F, and any sample that falls out of this temperature range will fall under suspicion immediately.

The containers for collecting the samples normally have a built-in thermometer, which registers the temperature of the urine once it enters the container. Therefore, even though it is easy to acquire synthetic urine, hiding it and successfully using it to pass a test can prove much harder.

Ways Of Keeping Synthetic Urine Warm

image of microwaving your synthetic urine1. Microwaving

Microwaving fake urine is perhaps the easiest way to get it to the desired temperature. To do this, all you have to do is simply place the container containing the liquid into the microwave and warm it for around 10 seconds. To test if the sample is usable, you can use a temperature strip. If you leave the fake urine in for a longer period then you risk it attaining an unusually high temperature, and it can get tricky. You could wait for the sample to cool slightly, but you should understand that too much heat destroys fake urine.

2. Using Your Body Heat

Using your body heat to keep the fake urine warm is another option. Here, all you have to do is put the sample in a sealed plastic bag and maintain the required temperature by placing it near a warm part of your body. The part of the body you choose is up to you but for most men the crotch area is usually the preferred area. Others prefer inside their underwear or in their inner thighs. For most women, inside their bras or their armpits is usually the preferred location.

3. Using Hand Warmers

These convenient and readily available devices provide an easy way of heating synthetic urine. All you have to do is put the fake urine in a sealed bag or small container, wrap the hand warmer around it, and use an elastic band or tape to secure it. Please note that different hand warmers work differently. Some warm up as fast as they cool up in a matter of a few hours. Hand warmers that maintain the perfect temperature of between 90°F to 100°F are the best for the job. However, it can be advisable to look for one that can keep the heat for as long as you may need it.


This article has been a discussion about how you can keep fake urine warm for a pre-employment screening. Using the knowledge provided here, you are now in a better position to use fake urine to pass any urine test.

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