My adult son works in a restaurant/pub which gets very hot. He seems to sweat excessively and although he does not smell (he showers twice daily and uses antiperspirant) he is very conscious about damp patches on his clothing under the arms and down his back. He asked me to post this and ask for advice on how he can prevent this because he works in the service industry he does not want his appearance to be off putting to customers. Please help.