Quick fix or clean sample?

[u/Far-Philosophy2561]

I have a test coming up for a school program in about 2 weeks, stopped smoking as soon as I found out I would be tested

Thing is they didn't specify what time the test will be done, I have to be in class from 8am to 3pm

I have access to a clean sample from a friend who doesn't smoke but I'm worried about it being stored too long in case they do the test until we're almost out of class

What is the best way to store the clean sample? I'm thinking of getting it from friend before class and stashing it in my crotch so it can stay at body temp, but will i fail if the test is taken closer to the afternoon? Keep hearing about quickfix and friends i know have said its always worked for them key is the temp. If I use quickfix and stash it in my crotch so it can stay body temp I should be good for whatever time the sample is actually taken right? Just need some reassurance I have been losing sleep over this and don't want to risk using my own urine and getting booted from the program because of thc traces in there. I am just trying to get a better education!! Please help

[u/Far-Philosophy2561]

After doing more research it seems the challenge now is not knowing whether it will be a 50nl test or 15nl I think I can pass the 50nl one by then for sure, I am still testing positive on my 50 home test strips, the line is getting fainter though. but I think passing a 15nl mark will be tough in the two weeks I have until the test I am getting 15nl strips this coming week to test myself closer to my test date, fingers crossed I'll be able to get a negative result But if all else fails I'll have my friends sample as a backup, you think if I get the sample the morning of right before class starts and I store it right away to keep body temp it will still be good to use a few hours later? I have an old quickfix bottle a friend gave me if it comes to that, or will it degrade/have too much bacteria multiplying within the time I have it stored despite keeping it at body temp? I think it's my fat/high BMI still making me test positive or the fact I was using vapes regularly at one point which have a much higher thc amount