I'm sure you already know this, but not testing won't help you. Instead of being able to see when you are high, try and spot the patterns/causes and take action, you'll still be high, but have no idea about it and no chance of changing it.
As a behavioural change, perhaps you could try and see the high readings as an opportunity to get it right next time? Thousands of engineers and scientists have just seen failure as a method of eliminating something unsuccessful, getting them closer to the solution.