easily fall back asleep, it may be due to my age

Once I wake up, I cannot fall asleep easily, which may be because of my age.

ChatGPT

Once I wake up, I cannot easily fall back asleep, which may be due to my age.

Notes:

1. Changed "fall asleep" to "fall back asleep" for a more precise description of returning to sleep after waking up.

2. Replaced "because of" with "due to" for a slightly more formal and concise expression.

3. Ensured the sentence flows smoothly for better readability.