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I never was any good at Haematology!!!!!!!!!!

Just wanted to follow up about this. I was put in a virtual meeting with the folks who actually create the BT10 indicators (and relabel them for fisher to sell). It was the most demeaning meeting I've been part of in a while. I was told that any or all of the following HAD to be true: -The refrigerator temps had to be at 8C or above -- I have 4 continuous monitor probes that have not been over 5.7C in years with an average of 3.4C -The blood must be over 8C when the indicators are placed -- I have tested this many times with a contact IR thermometer and units very from 5.6-6.7C out of the supplier transport box, they are then left in the fridge at least 30min to acclimate before attaching the indicator which puts them at 5C or less. I have even placed them on glycerol bags with a probe inside and there is no reason why these things should activate. -The indicators are not fully attached to the bag -- there is a ring on the indicator that has no adhesive, so getting a full adhesion is challenging but I have more that alert that are fully attached and more than do not alarm that are NOT fully attached. -I need to activate these, then freeze them until ready for use -- I have to follow manufacturer's written instruction so says the standards (which does not include this) and the product touts that it requires NO pre conditioning at all. This is crazy. They explained how these work to me about 10 times, when I have no issue understanding the physics. It just doesn't work like they claim. I tried an experiment by testing a unit at 5.7C straight out of the shipping box, placed an indicator at 0 min, 15min, 30min, 1hr, 2 hr,while placed in the fridge (3.8C). Only at day 3, did I get alerts on the 0, 15min and 2 hr indicator. Then at the 1 week mark, all indicators had alerted. I have yet to get further feedback from the manufacturer but at this point my experience with them is so poor that I'm going back to my old vendor. At no time is anything in the process >7C, much less the 10C at which these are supposed to alert. Nevertheless... we're doing something wrong. Feel free to poke holes in my experiments.