Clinical perspective, offered as context rather than as advice. The version of this that has an answer is narrower than the version being asked. Narrow it and it becomes tractable; leave it broad and the thread will produce nine confident and incompatible replies.
SleepDoc_PDX said:The boring version of this is the one that works, and the boring version is: measure a baseline, change one variable, wait, measure again under the…
There is a second half to this that has not been said yet. If two explanations both fit, the useful question is which one predicts something the other does not. That is answerable; arguing about which sounds more plausible is not.
Happy to go further on any of that.
One concrete data point for the thread. Practical: whatever you change, write down the date and the reason. In three months the reason is what you will have forgotten, and the reason is what makes the record worth having.
Ask again with the specifics and you will get a better answer than this one.
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Shop Reference StandardsA narrower follow-up, since the general answer is now clear:
How long did you give it before you decided it was working?