-The recommended method is to suspend the loop (for safety you can set AAPS to [**LGS**](#Preferences-aps-mode) to avoid lows, as done for achieving [objective 6](#objectives-objective6)), which will revert to your default background basal rate. Observe how your **BG** changes: if it is dropping, basal rate is too high. And vice versa.<br/> An alternative method (may be more tricky) is to keep the loop running, and seeing how **IOB** changes. If **IOB** is negative, your basal rate is too high. And vice versa. Beware that this method relies on **ISF** to correct **BG**, and thus depends on other variables to be set reasonably well for it to be successful.<br/> Another way of adjusting your basal rates is to watch the loop action during the night, when all COB have decayed. This method is particularly useful for children, when fasting is difficult or insulin needs change often. [Dr Saleh Adi from Tidepool](https://www.youtube.com/watch?v=-fpWnGRhLSo) provides useful ways on how to analyze overnight BG lines in order to optimize your basal rates.
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