Why in the HELL are you doing it in the MIDDLE OF THE DAY? Good Grief. Get up a half an hour early on Monday morning, WHEN IT IS COOL and do the 3 day Calibration. Wednesday LATE do it again. If you are in a hot area do the Dyne Calibration Thursday morning WHEN IT IS COOL.
If you are open like we are 8 to 2 on Saturday, as long as you start Wednesdays calibration after 2 you are good till Monday morning.
You ALWAYS calibrate when it will not stop you from doing a check if you have one come in.
How many have you missed because it will not calibrate?
Your LACK of common sense and not thinking is scary. Think thing OUT.
Interesting that when you TELL the TRUTH, people get upset. Plus some people can NEVER admit when they are WRONG.