Baby sensitive to heat + often has heat rashes

Mummies who have babies who are more sensitive to heat, perspire a lot and often get heat rashes… I need some advice! My baby has heat rashes often since birth. We have seen a PD when she was newborn and was advised not to apply any moisturiser as it clogs her pores thus causing the rashes. However, her rashes still comes on and off daily with the humid weather, and I’m bothered by the little bumps on her skin. Any recommendations for creams that work for your baby? Or what else works? Please share! :)