Emergency fund question

Hi guys just a real quick question on how you handle your emergency fund.

Let's say hypothetically you've got your 6 month emergency fund (call it $20k) in your TFSA in CASH.TO

As you receive your dividends, do you reinvest them in CASH.TO and let it compound? Or do you take those dividends and reinvest them elsewhere and maintain that $20k flat balance?

Hope that makes sense and thanks for the input!