Bub perspires a lot, even when aircon is on, but say at 24-25 degrees. How can I better train her not to perspire so much?

My baby does the same thing. Is your baby under 3 months? And does he/she only sweat on the head? Cause a newborn baby has no active sweat glands save the ones on his head. You must have realised that your baby's body never sweats. It is only the head that sweats a lot. This is because only the baby's head had active sweat glands. If your baby's head is breaking into sweat, it just means he or she is feeling hot.