How reliable is the heat pack?

[Istoppedsmoking]

I'm just curious at how reliable a heat pack is? I have to drive and wait about 1 hour after I microwave synthetic urine. I plan on taping it to my inner thigh and have the heat pack against it also taped. My only problem is that where I'm going to take the test is an hour drive (plus however long it is to wait to be tested).

How efficient is the heat pack on keeping the temperature above 90 degrees? I don't want to get there and have it below and be all "well shit..."

[Stacks62]

I'm just curious at how reliable a heat pack is? I have to drive and wait about 1 hour after I microwave synthetic urine. I plan on taping it to my inner thigh and have the heat pack against it also taped. My only problem is that where I'm going to take the test is an hour drive (plus however long it is to wait to be tested).

How efficient is the heat pack on keeping the temperature above 90 degrees? I don't want to get there and have it below and be all "well shit..."

It depends on how fresh the pack is. I have some that were manufactured 6 years ago, only heated for about 45 minutes. I have some i recently purchased but are two years old, work for about 1-2 hours very well, then cool but still keep it at 90.7 5 hours later. You will have to practice and use the same batch from what your practice is based on. I think this info should be included in the stickies too.

[Stacks62]

there should be an exp date on the back, I hear they are good for 6 years.

[Istoppedsmoking]

Well I think I'm just going to use two packs on them, and then before I get there pull aside and check the temp and the heat packs themselves and if they are a bit cool, just change them out. So I'll have a few.

Just wondering if it is reliable to begin with when it was over an hour from when the synthetic urine is microwaved. What experience have you guys had? I don't have to worry about it being sent to a lab, they do the testing onsite right in front of me as soon as I give it to them in a 5 panel screen.

[Burnt Toast]

In more than 10 years that Ive used synthetics that feature a heatpad, Ive only had one heatpad that was a dud. It had quit working after only an hour after activation. Luckily Ive had a backup, which I had previously purchased at my local camping/outfitters store (which sells them year 'round instead of seasonal).
The rest of the heatpads, as well as the above-mentioned backup, kept on working after 6-plus hours.

[Istoppedsmoking]

That's what I figured, it seems weird for a heatpad to last any less than 4 hours (3 hours if pushing...)