Mid stay housekeeping charges

Is there a way for the system to automatically add in our mid-stay housekeeping charge? I.E. if a guest books for a stay of 21 days or greater, then the mid-stay housekeeping fee is triggered and added to the charges. (if a guest books for less than 21 days, the system does not trigger the additional fee)
Thanks!
Laurie

If you look at Settings > Surcharges and Discounts > Booking Fields > Number of Nighs is Greater Than or Equal To.

Just make it "Applied Automatically" and do a Fixed Amount "Per Stay."

Hopefully that's what you're looking for.

Thank you Lydia! That worked perfectly. Appreciate you taking the time to answer! Mahalo!