Weird breast topic for busty women.

Sooooo I love summer but I hate boob sweat like omg! I am full DD and I really have issues with this. It will even make rashes and it hurts. I have to wash 3-4 times a day bc I do sweat a lot and I don't know how to make it better. Any advice or creams that are out there for this? I used powder and wear a thin comfy bra but when I'm going 24-7 in this heat and have to carry these jugs around it gets aggravating lol