Possible contributors
Poor sleep, stress, illness, medication effects, depression or anxiety, dehydration, hearing difficulty, and multitasking can all make thinking feel slower. Different causes require different responses.
Track the pattern
Note when the fog appears, how long it lasts, what you were doing, how you slept, and any new medicines or health changes. A pattern is more useful than a vague label.
Where a product fits
An audio routine may help some people create a quiet transition, but it cannot identify why you feel foggy. If symptoms persist or worsen, seek an appropriate evaluation.