Have no fear! I just used it for the first time, and passed with flying colors! I could be a rep for this stuff I'm so confident in it. Most places test the temperature, but mine didn't. (Even though it was at around 96 when I took the test, they never even bothered to check). Then she sealed it in front of me, and sent it off to a lab in another state. I got the call today that I passed my test, and start work on Monday! Don't be nervous!