Dude, invest in a home test and find out if you need to worry. I recently passed a UA using Quick Fix also, but I was still testing positive the night before the test so I had no choice. I had no problem getting the bottle warm enough, in fact it got too warm (it was a hot day) and I had to sit in the parking lot until it cooled down some (then they didn't even look at the temp. strip where I took my test at a Quest clinic). Good luck!