Planning to Refinance looking for suggestions

[Mahi Mir]

I currently closed my first rental property this month at 5.875% 30 yr fixed conventional rate with a payment of $1100 per month. Rental is $1450 per month so the net positive cashflow around $225 per month after all expenses. Question is it suggested to REFI to a rate of 4.875% now again with a closing cost of $2000  which might increase the cashflow for $325 per month . I plan to hold the property for another 5 yrs hopefully . Thanks for any insights and suggestions.