1 month old w/ fever; help please

Felicia
This morning my baby boy has a temp. w/ a pacifier thermometer of 100.5 F. My husband gave him a bath it went down to 99.0 F. Now it's back up to 100.8 F. We're keeping him dehydrated with 1 oz. water & 2 oz. enfimal gentlease. He has a light short sleeve onesie & light blanket. What else should we do?