Just to share a tip with everyone, of all the resorts we stayed at, there are always ants, even on the 3rd floor, even in the cleanest of hotels.
They appears like magic from tiny carcks in the trim works around doors and by the bathroom sink. We carry a roll of pennies with us and by placing several pennies in a row to block the path and the ants disappear!
Every room has several enterences and exits and you’ll need many pennies to create an effective barrier.
Someone should apply for research money to find out why this works.