log it
mon 4.1 / door 7.2
tue 4.0 / door 7.8
wed 4.2 / door 6.9
thu 3.9 / door 7.4
fri 4.1 / door 8.1 <- shopping day
sat 4.3 / door 7.0
sun 4.0 / door 6.8log it
mon 4.1 / door 7.2
tue 4.0 / door 7.8
wed 4.2 / door 6.9
thu 3.9 / door 7.4
fri 4.1 / door 8.1 <- shopping day
sat 4.3 / door 7.0
sun 4.0 / door 6.8unopened and in-use in the same place is fine. just keep the in-use one where you can reach it
test it
powder is robust
door shelf or back of the fridge
hotel minibars are frequently not cold enough. i take a thermometer, which is ridiculous and also correct
power cut with the door shut for a few hours is fine. a full fridge holds temperature surprisingly well
mon 4.1 / door 7.2
tue 4.0 / door 7.8
wed 4.2 / door 6.9
thu 3.9 / door 7.4
fri 4.1 / door 8.1 <- shopping day
sat 4.3 / door 7.0
sun 4.0 / door 6.8genuine question light exposure matters much less than temperature for these. i still keep them in the carton
buy a thermometer. mine reads 6.2 on the door and two degrees lower at the back