I’ve had diabetes for 14 years and honestly never used a meter as temperature sensitive as the wavesense jazz wireless. Keeping it very close to your body is the only way to get a reading out of the thing. It only works for me if it’s over at lease 16-17c, and so it often ends up down my bra, wrapped in my hands, or anywhere else I can stuff it to warm it up enough to use.
Only sticking with it because it’s so tiny it’s quite convenient to carry, and hopefully it will be soon warm enough that getting the meter up to temperature won’t be as difficult.