Synthetic Urine Temperature Strip Not Working (2 Causes)

A hand holding a synthetic urine temperature strip

Most synthetic urine kits come with a temperature strip that monitors the temperature of urine samples for a drug test. A temperature strip might not work for various reasons that can be easily corrected. 

To help you fix it, we have spent weeks meticulously researching the science behind its function and actively testing several synthetic urine kits’ temperature strips. Drawing from our tests, we assembled this article’s in-depth analysis of a synthetic urine temperature strip. 

Quick Summary

  • A synthetic temperature strip is a thermometer strip with a temperature scale of 90-100°F.
  • It works by displaying blue, green, and black colors as temperature changes.
  • A green dot shows that the urine’s temperature is within 94-100°F. 

What is a Synthetic Urine Temperature Strip? 

A jar with a urine temperature stripA synthetic urine temperature strip is a heat-sensitive thermometer that changes color to suggest temperatures within a scale of 90-100°F. It is typically found on the lower side of the bottle. 

It’s crucial to check the temperature of the urine sample before submitting it, as testers use this to validate your sample.

If the temperature is not within the correct range, your sample will be flagged for tampering and labeled invalid [1].

That’s why most quality synthetic urine kits ensure that each solution has a temperature strip to increase your chances of passing a drug test. 

“Normal body temperature is within 98.6°F therefore urine must be within an average temperature range between 90°F to 100°F. ”
Jeffrey Fudin, Medical Reviewer 

Temperature strips work by displaying a range of colors from blue, green, and black per temperature changes. The strip contains a series of elements sensitive to heat and cold. As heat flows, these elements change, and the strip displays color to indicate the actual temperature range. 

As soon as the temperature hits the 90°F mark, the temperature strip changes to blue and finally green when it edges towards 94 and 100°F. These color changes allow you to monitor the sample until it is within body temperature. 

How to Read a Temperature Strip

A person reading a temperature stripTo read a temperature strip, check the color change within the temperature scale. A synthetic urine temperature strip gets activated once the temperature ranges between 90-100°F. 

The color green indicates the temperature is within 32-38°C/90-100°F. A blue dot gives you the temperature at which the urine sample should be heated. 

You should also remember that if the bottle isn’t heated enough, there won’t be any reading in it, so you must leave it in the microwave until the blue and green dot appears.

Additionally, if your sample feels warmer than your skin, a black dot will be predominant, and you’ll have to let it cool for a while until the green dot appears. 

Read More: How to Read a Temperature Strip on a Drug Test

What Causes Temperature Strip Not to Work?

Overheating and underheating cause the temperature strip to not work. 

Here’s how:

1. Underheating

A doctor holding a jar of urineSince the temperature strip is designed to detect temperatures above 90°F, anything lower than that fails to display a color change on the strip. Further, since you can reheat fake urine multiple times, you can return it to the microwave until the temperature strip shows a green dot. 

Note that a synthetic temperature strip only indicates color when the sample’s temperature is within the accurate levels; otherwise, there won’t be any display until you get it up to between 90-100°F. 

To make this process easier, we recommend positioning the bottle inside the microwave with the temperature strip facing you so it’s easier to tell when the strip goes from blue to green. As soon as it does that, remove it to avoid overheating. 

2. Overheating

When the solution is above 100°F, the temperature strip indicates black, showing the sample is overheated. To bring the temperature down, place it further away from the heat source and let it cool. 

Note that cooling will take a few minutes, so it’s important to adjust your schedule to ensure you don’t submit late. Additionally, you should be careful with overheating synthetic urine, which might break down its components. 

How to Get Synthetic Urine to the Right Temperature

A jar of synthetic urine in a laboratory

To get synthetic urine to the right temperature, you should follow the following steps: 

  1. Open your urine kit and verify the batch number on the instructions.
  2. Remove the cap and give the bottle a good shake.
  3. Microwave the urine bottle for 10 seconds or until the temperature strip registers a reading.
  4. If there is no reading, it is probably too hot; therefore, wait for the sample to cool for two minutes before performing step 3 again.
  5. After removing the fake pee, turn on the heating pad included in the urine kit.
  6. Put the heating pad on the rear of the urine bottle, on the side opposite the temperature strip, and fasten it with the accompanying rubber band.
  7. Place the urine bottle securely, like your underwear, bra, socks, etc.
  8. Close the door, take the fake pee out, and check the temperature; anything between 92 and 99 degrees will do. 

Carefully read and understand the instructions. Pay attention to the recommended temperature range and how to heat and maintain the desired temperature. Even if you use synthetic urine, read the manufacturer’s instructions before using it. 

Make the most of your time to practice heating and maintaining the synthetic urine temperature if you have less than 24 hours to get ready for the urine test. The most important step in using this product is getting the temperature range you want, which heating synthetic urine may help you do.

Related Articles:


What Are the Colors of the Urine Test Strips?

The colors on urine test strips can vary, but most commonly, they include various shades of colors such as yellow, green, blue, pink, purple, and brown.

Are All Synthetic Urine Brands with Temperature Strips Accurate?

No, not all synthetic urine brands with temperature strips are accurate. The accuracy of temperature strips can vary depending on the brand and quality of the synthetic urine. It’s recommended to choose reputable brands with reliable reviews.

Enhance Reliability by Using Quality Synthetic Urine Kits

A synthetic temperature strip is essential in fake pee kits for monitoring temperature to keep it at an accurate level. However, underheating and overheating can cause it not to work as it’s meant to read temperatures within 90 and 100°F. To fix this, heat or cool the solution until a green dot appears. 

Additionally, the key to a functional synthetic temperature strip lies in the quality of the synthetic solution. This is why we recommend using the Clear Choice Sub Solution synthetic urine kit.

Sub Solution has a complex formula free of toxins and biocides and a premium heat activator powder that ensures accurate temperature emulation and a reliable testing experience.



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